Ontario, California
Ontario's land is held by public agencies, industrial REITs and a mall REIT; San Bernardino County publishes its roll free but blanks every owner name, so owners here come from the City's audited reports, the airport authority and SEC filings.
8 buildings · 4 with an owner established · 22 sources · 3 tier B · 5 tier A · prepared 2026-10-15
Can you find out who owns it?
California has no public title register: ownership is proved by deeds recorded with the County Recorder, and the County Assessor keeps the roll. San Bernardino County's Assessor-Recorder-County Clerk publishes its secured roll and owner-transfer files as free downloads, but owner names and street addresses are hidden 'per California Government Code Section 7928.205'. The Recorder's online index (1925 to the present) is free, but document images can only be viewed in person at the Hall of Records; copies cost $4 for the first page. Under Proposition 13 a sale resets the roll value, and the documentary transfer tax ($0.55 per $500) is the only price signal on a deed.
Is ownership public?Public, but one paid search at a time
Cost of one title search$4.00 first page, $1.50 each further page (Recorder document copy)
Bulk ownership dataNone published
Sale pricesEvery sale, address generalised
1
The marquee buildings
The towers that set the tone of the core, and who holds them. A price is the price a document states, on the date it states — not an estimate of what the building is worth now.
| Building | Use | Owner | Owner type | Last price paid |
|---|---|---|---|---|
| Ontario International Airport (ONT) 2900 E Airport Dr, Ontario, CA 91761 1,741 acres; Terminals 2 and 4, 265,000 sq ft each |
Civic | Ontario International Airport Authority Wikipedia's infobox gives 'Owner/Operator Ontario International Airport Authority', a joint-powers authority of the City of Ontario and San Bernardino County. The City bought the first 30 acres in 1929; Los Angeles World Airports later ran it. In 2013 the City rejected LAWA's $474M offer to hand it back; a 2015 settlement turned ownership over, with LAWA 'to be reimbursed for its investments', and the Authority took control in November 2016. No settlement sum is stated, so no price is given. The City's economic-development page (s19) gives the address and the $270M twin terminals of 1998. flyontario.com is behind Cloudflare and was not read, hence tier B. |
Government | —B |
| Ontario Mills Ontario, CA (Ontario Mills Pkwy at I-15/I-10; street address not stated in the filing) 1,430,423 sq ft |
Retail | Simon Property Group (50% joint venture) 50.0% Simon's 2025 10-K lists '12. Ontario Mills, CA, Ontario (Riverside)' under The Mills: held in fee, Simon's ownership 50.0%, a joint venture accounted for under the equity method, acquired 2007 (the year Simon bought The Mills Corporation), 100.0% occupied, 1,430,423 sq ft; anchors include Burlington, Nike Factory Store, Marshalls, Nordstrom Rack, Dave & Buster's, AMC Theatres, Uniqlo and Skechers. The filing does not name the other 50% partner, and states no price for the 2007 acquisition of this centre. |
REIT | —A |
| Toyota Arena (formerly Citizens Business Bank Arena) 4000 E Ontario Center Pkwy, Ontario, CA 91764 225,000 sq ft; 10,832 seats (basketball) |
Civic | City of Ontario The City's economic-development page: 'Toyota Arena, built and owned by the City of Ontario, is operated by ASM Global'; 225,000 sq ft with 36 luxury suites; home of the Ontario Reign (AHL) and Empire Strykers (MASL). The City's FY2025 ACFR lists 'Toyota Arena Entertainment District Improvements' among City capital projects. Wikipedia (s8) adds that it opened 18 October 2008 at a cost of US$150 million, debt free because the City sold other properties, on former Ontario Motor Speedway land. |
Government | —A |
| Ontario Motor Speedway site (now the Ontario Center) North of I-10 around Ontario Center Pkwy, Ontario, CA about 680 acres (track); 1,540-acre planned centre |
Land | Not established a paid title search would answer it Wikipedia: the 1970 speedway went into debt and in October 1980 was bought by the Chevron Land Company, a Chevron subsidiary, which closed it two months later and demolished the track in 1981-82 to build the Ontario Center, a mixed-use district of shops, housing, hotels, offices, a school, a park and Toyota Arena. The land has since been subdivided and sold piecemeal; no source read says who holds the remaining parcels today, and the County's roll files hide owner names. The 1980 price is historic, not a current owner, hence owner blank. |
Not established | $42M 1980-10 Offer by Chevron Land Company approved by OMS Corp. on 9 Oct 1980, incl. $13.4M of overdue interest; Wikipedia's account, not a deed. B |
| Kaiser Permanente Ontario Medical Center 2295 S Vineyard Ave, Ontario, CA 91761 214 licensed beds |
Institutional | Not established a paid title search would answer it The California Department of Public Health's facility listing (data date 16 Sep 2026) gives 'Kaiser Foundation Hospital - Ontario', licensee 'KAISER FOUNDATION HOSPITALS', a nonprofit corporation, 214 beds, active, licensed as part of a consolidated licence with a parent facility. A licence names the operator, not the holder of title, and no deed or filing naming the owner was read; the County's roll files hide owner names. Owner left blank rather than assumed. |
Not established | —A |
| ONT Field and the Ontario Sports Empire 9375 E Riverside Dr, Ontario, CA 6,500 seats; 112-acre complex |
Civic | City of Ontario Wikipedia's infobox gives 'Owner City of Ontario'; ground broken 28 Oct 2024, opened 21 March 2026, home of the Dodgers' Single-A Ontario Tower Buzzers; the airport bought naming rights. The City's FY2025 ACFR carries it as a City capital project: 'Ontario Sports Empire - Professional Baseball Stadium' $166.9M authorised ($88.1M spent to 30 June 2025), plus parking structures, and says Capital Projects Fund spending rose $311.8M 'mainly due to development of the Ontario Sports Empire'. The City's own release (s11) names its design partners. Tier B: ownership rests on Wikipedia plus the City's capital accounts. |
Government | $172M 2023-03 Council approval of the 112-acre land purchase, per Wikipedia citing the Daily Bulletin; no deed read. B |
| Ontario Convention Center Ontario, CA (Convention Center Way; no address stated in a source read) |
Civic | Not established a paid title search would answer it The City's FY2025 ACFR names it among the City's venues and says energy-efficiency improvements funded under a City lease agreement were installed 'primarily at the Toyota Arena, the Convention Center, the Police Department, the Ovitt Family Library, and the City Hall Annex', which points to City ownership; Wikipedia says it opened in 1997. No document read states the title holder in terms, so it is left blank rather than inferred. |
Not established | —A |
| Ontario Ranch (former agricultural preserve) South Ontario, between Riverside Dr and the Riverside County line 8,069 acres (Wikipedia); '13 square miles' (City) |
Land | Not established a paid title search would answer it Not one holding: the City's FY2025 ACFR calls it 'An 13,000-acre former agricultural preserve' that will add about 60,000 homes and 193,000 residents. Land is divided among master developers and homebuilders (Wikipedia lists communities by Lennar, Brookfield Residential, Landsea Homes, Lewis Community Developers with Stratham, Woodside, KB Home, Tri Pointe, Pulte, Taylor Morrison and New Home Co). The only owner entity a public record ranks is 'DPIF3 California 36 Ontario Ranch LLC', the City's 8th-largest taxpayer at $352.9M (ACFR FY2025); who stands behind it is not stated. The remaining dairy and farm parcels are not named in any document read, and the County roll hides owner names. |
Not established | —A |
2
The core land
The most valuable ground in the city, and what the public record says about it.
The City's audited report is the only free document read that ranks private owners: it reprints the ten largest property taxpayers from the County roll. The County's own roll files are free but carry no owner name or street address. Values are Proposition 13 roll values, not market prices, and the taxpayer figures include business (unsecured) property.
City taxable assessed value, FY2025$43.02B
City $33.34B (secured $30.62B + unsecured $2.83B, less $0.11B exemptions) plus successor-agency (former redevelopment) areas $9.68B, up from $20.91B in FY2016. ACFR FY2025, Schedule 5 (County Auditor-Controller). The principal-taxpayer schedule uses a total of $43.26B.
Ten largest property taxpayers, FY2025$5.30B, 12.24% of the roll
Prologis $1,444.6M; United Parcel Service Company $802.1M; Ontario Mills LP $447.2M; Costco Wholesale Corporation $409.5M; Ontario Land Ventures LLC $388.3M; Palmer Ontario Properties LP $382.8M; Rexford Industrial Realty LP $372.9M; DPIF3 California 36 Ontario Ranch LLC $352.9M; Federal Express Corporation $348.4M; ELV Phase 1/2 LLC $347.2M. In FY2016 the top ten held $2.14B (10.21%). ACFR FY2025, Schedule 7 (HdL Coren & Cone).
Largest single taxpayer$1.44B (Prologis)
3.34% of the city roll, up from $392.7M (1.87%) in FY2016, when UPS was narrowly first. ACFR FY2025, Schedule 7.
City land and land held for resale, 30 June 2025$354.8M land; $175.2M held for resale
Land at cost: governmental $338.6M, business-type $16.3M (MD&A Table 8). Land held for resale $175.2M in governmental activities; the ACFR does not list the parcels. ACFR FY2025.
3
Who owns the town
At this scale the significant owner is rarely a trust or a fund: it is one or two local holding companies, a family in its second or third generation, and often the land around the town rather than the buildings in it.
Ontario's largest holdings named in documents are public: the airport authority's 1,741 acres, the City's own land and the City's new 112-acre sports complex. Private holders appear only in the City's ten-largest-taxpayer list, which gives value but not acreage. The County roll hides owner names, so acreage by owner could not be counted. Ontario Ranch's remaining farmland and dairies are not attributed to any owner in a document read.
| Name | Type | Holdings as stated |
|---|---|---|
| Ontario International Airport Authority Joint-powers authority of the City of Ontario and San Bernardino County; owner and operator of the airport since the November 2016 transfer from Los Angeles World Airports (Wikipedia). Its cargo tenants include UPS, FedEx and Amazon (City economic-development page). The Authority's site is behind Cloudflare and was not read. |
Government | 1,741 acres (ONT)B |
| City of Ontario ACFR FY2025: governmental land $338.6M and business-type $16.3M at cost, plus $175.2M of land held for resale (parcels not listed). The City owns Toyota Arena and, per Wikipedia, ONT Field on a 112-acre site whose $172M purchase the council approved in 2023; it took over Euclid Avenue from the State on 20 June 2024 (s12). 11 fire stations, 562 street miles. |
Government | Land at cost $354.8M; $175.2M held for resaleA |
| County of San Bernardino Co-member with the City of the Ontario International Airport Authority (Wikipedia). No County land inventory for Ontario was read. |
Government | Joint member of the airport authorityB |
| Ontario-Montclair School District Listed among the City's principal employers in the FY2025 ACFR ('Ontario Montclair Elementary School'). No land or school-site figure was read. |
Government | 19,286 students (2020-21); 1,000-4,999 employeesB |
| Chaffey Joint Union High School District Serves Ontario and neighbouring cities, more than 25,000 students (Wikipedia); a principal employer in the City's FY2025 ACFR. No land figure was read. |
Government | District office 211 W Fifth St, Ontario; 1,000-4,999 employeesB |
| Prologis The largest private holder by value on the City roll (ACFR FY2025). Acreage not stated. |
REIT | $1,444.6M taxable valueA |
5
Who builds the houses
New-home building in this market: the volume, and the firms behind it. Ownership of a builder matters as much as its volume — a private-equity platform and a family firm behave differently.
Almost all of Ontario's new housing is in Ontario Ranch, where master developers sell finished lots to national builders. Census permits for the city: 2023, 601 single-unit homes, 32 units in 3-4 unit buildings and 2,163 units in 355 buildings of 5+; 2024, 306 single-unit, 4 two-unit, 29 in 3-4 unit and 300 units in 36 buildings of 5+; 2025, 690 single-unit, 17 in 3-4 unit and 1,082 units in 52 buildings of 5+; January-August 2026, 489 single-unit and 302 units in 20 buildings of 5+. The City says Ontario Ranch built 1,200 homes and sold 1,027 in 2023. No permit list naming builders was read, and public builders report only regions, so the builder list below rests on community counts from Wikipedia and the City, not on units.
| Name | Type | Ontario Ranch communities named |
|---|---|---|
| Lennar Wikipedia's Ontario Ranch list: Park Lane, Grand Park, Landmark, Parkside (with New Home Co), Beacon, Monument, West Haven; no unit counts. |
Public company | 8 communities/neighbourhoods (incl. Parkside with New Home Co)B |
| Landsea Homes The City's Ontario Ranch page says Landsea's Rohe, Alto and ShadeTree are sold out and that it is adding 144 townhomes to Eave and 95 homes in Dusa. Wikipedia lists Neuhouse, Amberly, Birchley, Willowton and Elmwood too. Landsea Homes was a listed company; its current ownership was not re-checked here, so it is marked private only provisionally. |
Private company | 10 communities namedA |
| Brookfield Residential Wikipedia: New Haven (master-planned), Holiday, Waverly, Summerset, Edenglen. Brookfield Residential is a subsidiary of Brookfield Corporation. |
Public company | 5 communities/neighbourhoodsB |
| Woodside Homes Wikipedia: Canopy Creek, Cambridge Court, Waterford. |
Private company | 3 neighbourhoodsB |
| KB Home Wikipedia: Hadleigh, Margate. |
Public company | 2 neighbourhoodsB |
| Tri Pointe Homes Wikipedia: Kensington, St. James. Also listed: Lewis Community Developers with Stratham Communities (Park Place), Pulte (Cascade), Taylor Morrison (Meadowood). |
Public company | 2 neighbourhoodsB |
6
Commercial landlords
The commercial side, counted separately from housing: who holds the office, retail and industrial floor area.
Ontario is an industrial city: four of the ten largest taxpayers are logistics owners or carriers, and the largest, Prologis, holds 3.34% of the whole roll. The figures are the City ACFR's taxable values (land, buildings and business property together), with floor area where a REIT filing states it for the city. UPS and FedEx run their regional air hubs on airport land, so part of their value is likely possessory interest and equipment; the ACFR does not split it.
| Name | Type | Taxable value FY2025 / floor area |
|---|---|---|
| Prologis City ACFR FY2025: 3.34% of the roll, up from $392.7M (1.87%) in FY2016. Prologis's 10-K (s20) reports Southern California only as a market (108M sq ft consolidated) and names no Ontario buildings or floor area. |
REIT | $1,444.6M taxable value (rank 1)A |
| United Parcel Service City ACFR FY2025, 'United Parcel Service Company', up from $396.6M (rank 1, 1.89%) in FY2016; also the city's largest employer (5,000-9,999). UPS's 2025 10-K does not mention Ontario. Which of this is owned real estate rather than leased airport ground and equipment is not stated. |
Public company | $802.1M taxable value (rank 2)A |
| Simon Property Group (Ontario Mills LP) 'Ontario Mills LP' is the City's 3rd-largest taxpayer ($447.2M; $380.4M in FY2016). Simon's 10-K (s5) holds Ontario Mills as a 50% fee-owned joint venture. That the LP is Simon's joint-venture vehicle is a match of names, not stated in either document. |
REIT | $447.2M taxable value; 1,430,423 sq ftB |
| Costco Wholesale Corporation City ACFR FY2025; not in the FY2016 top ten. Parcels not named. |
Public company | $409.5M taxable value (rank 4)A |
| Rexford Industrial Realty Rexford's 2025 10-K lists 18 Ontario properties; the largest is Safari Business Center (16 buildings, 1,142,042 sq ft, acquired 2017, gross cost $159.7M in Schedule III); others include 5772 Jurupa Street (360,000 sq ft) and 500 Dupont Avenue (274,885 sq ft). The City ACFR ranks 'Rexford Industrial Realty LP' 7th at $372.9M. |
REIT | 18 properties, 46 buildings, 3,312,418 sq ft; $372.9M taxable valueA |
| FedEx City ACFR FY2025, 'Federal Express Corporation'. FedEx's FY2026 10-K does not mention Ontario. |
Public company | $348.4M taxable value (rank 9)A |
?
Looked for and not found
Claims this page would have made if a source could be opened. They are left out rather than guessed.
- San Antonio Regional Hospital: CDPH lists it at 999 San Bernardino Road, Upland (licensee San Antonio Regional Hospital Inc., nonprofit, 363 beds), so it is outside Ontario and not a marquee here; its Ontario satellite facilities were not traced to an owner.
- Ontario Mills: the other 50% partner in Simon's joint venture is not named in the 10-K read.
- Who stands behind the ACFR's top-taxpayer LLCs: Ontario Land Ventures LLC, Palmer Ontario Properties LP, DPIF3 California 36 Ontario Ranch LLC and ELV Phase 1/2 LLC. No filing read ties them to a parent, and the County's roll files hide owner names.
- Ontario Convention Center: City ownership is implied by the ACFR's energy-lease note but not stated; owner left blank.
- Union Pacific and Southern California Edison as Ontario landowners: UP's 2025 10-K mentions an 'Inland Empire' intermodal terminal but names no city; no SCE filing was read. Neither is listed.
- Inland Empire Utilities Agency: headquartered at 6075 Kimball Ave, Chino (Wikipedia); its Ontario plant sites were not read because ieua.org returned 403. Mountain View School District: no source read.
- Amazon, UPS and FedEx buildings at or near the airport: who holds title to the cargo buildings on Authority land, and to Amazon's large Ontario warehouse (opened 2024 per Wikipedia), was not read in any lease or filing.
- Prologis's Ontario floor area: the 10-K reports Southern California only.
§
Sources
- Assessor Property Information: Assessor Property Data Files (secured and unsecured roll, owner transfer files) - 'Names and address information protected per California Government Code Section 7928.205' — San Bernardino County Assessor-Recorder-County Clerk · openA
- Secured/Unsecured Roll File Monthly Record Layout: NAME and SITUS STREET NAME fields 'HIDDEN' — San Bernardino County Assessor · openA
- Official Public Records - Recorder's Index (1925 to present; index only, images viewable only in person, GC 6254.21) — San Bernardino County Recorder-County Clerk · openA
- Recorder-County Clerk Fee Schedule effective 1 July 2026 (document copy $4.00 first page, $1.50 each subsequent; documentary transfer tax $0.55 per $500) — San Bernardino County Assessor-Recorder-County Clerk · openA
- Simon Property Group Form 10-K for 2025: Item 2 Properties (The Mills: 12. Ontario Mills, CA, Ontario (Riverside), Fee, 50.0% ownership, footnote (4) 'Joint venture properties accounted for under the equity method', acquired 2007, 100.0% occupancy, 1,430,423 sq ft) — SEC EDGAR · openA
- Rexford Industrial Realty Form 10-K for 2025: Item 2 property table and Schedule III (18 Ontario properties, incl. Safari Business Center, 16 buildings, 1,142,042 sq ft, acquired 2017) — SEC EDGAR · openA
- Ontario International Airport (infobox: Owner/Operator Ontario International Airport Authority; 1,741 acres; history of the LAWA transfer, 2013 $474M offer rejected, OIAA control from November 2016) — Wikipedia · openB
- Toyota Arena (owner City of Ontario; operator ASM Global; 4000 East Ontario Center Parkway; cost US$150 million; built on the old Ontario Motor Speedway property) — Wikipedia · openB
- Ontario Motor Speedway (bought October 1980 by Chevron Land Company; Chevron offer $42,000,000; demolished 1981-82; site now the Ontario Center) — Wikipedia · openB
- Licensed and Certified Healthcare Facility Listing (health_facility_locations.csv, data date 16 Sep 2026): Kaiser Foundation Hospital - Ontario, licensee 'KAISER FOUNDATION HOSPITALS', nonprofit corp, 214 beds; San Antonio Regional Hospital (Upland), 'SAN ANTONIO REGIONAL HOSPITAL INC.', 363 beds; Kindred Hospital Ontario, 'THC - ORANGE COUNTY, LLC', 91 beds — California Department of Public Health via CHHS Open Data · openA
- ONT Field Named 2026 BaseballParks.com Ballpark of the Year (2 Sep 2026) — City of Ontario · openA
- Ontario acquires Euclid Avenue as downtown renaissance continues to take shape (24 Jun 2024): transfer of ownership from the state effective 20 June 2024 — City of Ontario · openA
- Annual Comprehensive Financial Report, fiscal year ended 30 June 2025: Schedule 5 Assessed Value of Taxable Property (p.235); Schedule 7 Principal Property Taxpayers 2025 and 2016 (p.237); Schedule 18 Principal Employers (p.248); MD&A Table 8 Capital Assets; land held for resale; capital commitments (Ontario Sports Empire) — City of Ontario, Financial Services (file served from content.ontarioca.gov) · openA
- Arena District: 'Toyota Arena, built and owned by the City of Ontario, is operated by ASM Global'; 225,000 sq ft; Phase 1 496 residential units — City of Ontario Economic Development (ontariothinksbusiness.com) · openA
- Ontario Ranch district page: '1,200 New Homes Built in 2023', '1,027 New Homes Sold in 2023', 13 square miles, 69,000 residential units at completion, 31 million SF industrial; Landsea Homes communities Rohe, Alto, ShadeTree, Eave, Dusa — City of Ontario Economic Development (ontariothinksbusiness.com) · openA
- ONT Field (infobox: Owner City of Ontario; 9375 E. Riverside Dr.; opened 21 March 2026; cost $100 million; March 2023 council approval of a $172 million purchase of 112 acres) — Wikipedia · openB
- Ontario Ranch (8,069-acre development area; list of master-planned communities and neighbourhoods by builder) — Wikipedia · openB
- Building Permits Survey, place-level annual and year-to-date files (West Region): Ontario city, FIPS place 53896 - 2023, 2024, 2025 and Jan-Aug 2026 — US Census Bureau · openA
- Ontario Airport facts: 2900 E. Airport Drive; $270 million twin terminals opened 27 September 1998; cargo tenants UPS, FedEx, Amazon — City of Ontario Economic Development (ontariothinksbusiness.com) · openA
- Prologis Form 10-K for 2025: Item 2 operating properties by market (Southern California, consolidated and O&M); no city-level breakdown — SEC EDGAR · openA
- Chaffey Joint Union High School District (address 211 West Fifth Street, Ontario; serves Ontario, Montclair, Rancho Cucamonga and parts of Fontana, Upland, Chino) — Wikipedia · openB
- Ontario-Montclair School District (19,286 students, 2020-21) — Wikipedia · openB