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Ontario has several properties that are listed in, or in the process of being listed in, the National Register of Historic Places.

No. Historic Name Address APN Designation Date
1. Frankish Building 200 S Euclid Avenue 104905803 August 11, 1980
2. Hofer Ranch 11274 S Turner Avenue 21121112 July 8, 1993
3. Ontario State Bank Block 300 S Euclid Avenue Demolished  
4. Euclid Avenue 24th St (Upland) to Philadelphia St Not Applicable August 10, 2005
5.  Dr. O.S. Ensign House 304 S. Laurel Ave.  109404304 March 20, 2012
6. Ontario Ballpark John Galvin Park Preparing Application  

National Register of Historic Places

The National Register of Historic Places is the nation's official list of buildings, structures, objects, sites, and districts worthy of preservation. The National Register was established by the National Historic Preservation Act of 1966. The purposes of the Act are: to insure that properties significant in national, state, and local history are considered in the planning of federal undertakings; and to encourage historic preservation initiatives by state and local governments and the private sector. The National Register recognizes resources of local, state and national significance; registers only those properties that have retained enough physical integrity to accurately convey their appearance during their period of historical significance.

Criteria for Designation

To be eligible for listing in the National Register, a resource must meet at least one of the following criteria:
  • Is associated with events that have made a significant contribution to the broad patterns of our history. 
  • Is associated with the lives of persons significant in our past. 
  • Embodies the distinctive characteristics of a type, period or method of construction, or represents the work of a master, or possesses high artistic values, or represents a significant and distinguishable entity whose components may lack individual distinction. 
  • Has yielded, or may be likely to yield, information important in history or prehistory.
California Register of Historical Resources

The State Historical Resources Commission has designed this program for use by state and local agencies, private groups and citizens to identify, evaluate, register and protect California's historical resources. The Register is the authoritative guide to the state's significant historical and archeological resources.The California Register program encourages public recognition and protection of resources of architectural, historical, archeological and cultural significance, identifies historical resources for state and local planning purposes, determines eligibility for state historic preservation grant funding and affords certain protections under the California Environmental Quality Act.

Criteria for Designation

To be eligible for listing in the California Register, a resource must meet at least one of the following criteria:
  • Associated with events that have made a significant contribution to the broad patterns of local or regional history or the cultural heritage of California or the United States. 
  • Associated with the lives of persons important to local, California or national history. 
  • Embodies the distinctive characteristics of a type, period, region or method of construction or represents the work of a master or possesses high artistic values. 
  • Has yielded, or has the potential to yield, information important to the prehistory or history of the local area, California or the nation.
Listing a property

Nominations for both the National and California Registers are submitted to the State Office of Historic Preservation (OHP). The City of Ontario is given the opportunity to comment on the nomination. For more information, please contact the Planning Department.
Last updated: 5/17/2012 4:40:33 PM