A Gazetteer for the United States and Canada

Ontario, California

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The location of Ontario

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Welcome to Ontario ...

The city of Ontario is located in San Bernardino County.

When the people of Ontario refer to themselves (known as a demonym), they frequently use Ontarian<1>

From the  Census Estimates for 2017, Ontario has a population of 175,841 people<2> (see below for details).

Ontario was incorporated December 10, 1891.

The community of Ontario is 850 feet [259 m] above sea level.<3>.

Time Zone: Ontario lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time

Ontario is within the boundaries of the (909) area code.

The ZIP codes for Ontario: 91758, 91761-91762, 91764, 91798<4>

Population Details ...

At the time of the 2010 Census, Ontario had a population of 163,924 people (which is 8.05% of the total population of San Bernardino County). This makes Ontario the county's 4th most populous community.

The population of Ontario represents 0.44% of the population of California (which has 37,253,956 people), making it the state's 29th most populous community.

With a 2010 count of 163,924 people, the population of Ontario increased 3.74% from the 2000 Census (with a count of 158,007 people).

Taken from the 2017 Census Estimates, Ontario had an population of 175,841 people. This is an increase of 7.27% since the 2010 Census (or an increase of 11.29% since the 2000 Census).

More information can be found on the Census Page for Ontario.

Communities near Ontario ...

The following is a sample of nearby communities. Please note that when we give a distance, it's a 'straight-line' distance from Ontario and not the distance if you are going to drive it.<5>.

Community   2017
Baldwin Park   [Map]   76,402   W   18 miles [29 km]
Chino Hills   [Map]   ---   SW   6 miles [9.7 km]
Corona   [Map]   167,836   S   13 miles [20.9 km]
Fontana   [Map]   211,815   E   12 miles [19.3 km]
Jurupa Valley   [Map]   106,028   E   10 miles [16.1 km]
La Habra   [Map]   62,466   SW   19 miles [30.6 km]

To learn more about neighboring communities and counties, please visit the Nearby Page for Ontario.

Communities Also Named Ontario ...

Using our Gazetteer, we have found that there are 13 communities that are also named Ontario - they are located in Illinois, Indiana, Iowa, Kansas, Michigan, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Utah, Virginia and Wisconsin.

For more information, see our Tidbits & Trivia Page for Ontario.

See Our Genealogy Helper Page ...

We have a couple of sections that should be of interest to those chasing their genealogy.

  • We have a list of cemeteries that are in the area around Ontario. We make it easy to see an overhead view of the cemetery.
  • Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Ontario. Our list includes information such as whether the community had a post office or railroad service in 1895.
  • We also have a detailed list of newspapers that have been published in the area around Ontario. Our list includes 21 papers.

These sections can be found on our Genealogy Helper Page for Ontario:

Websites for Ontario ...

Official Website:
Chamber of Commerce:

TripAdvisor Tourism Pages for Ontario ...

Looking for more information about Ontario? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you get an overview with links that will help you to find lodging, restaurants and attractions.

In addition to the Tourism page for Ontario, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Ontario.

Other Roadside Stops ...

Find a Community located in California

About San Bernardino County

About California

Off-the-Road Links ...

The official website for Ontario:

The official website for San Bernardino County:

The official website for State of California:

Footnotes ...

<1>A demonym is the name for a resident of a community which is usually derived from (or is related to) the name of that community. In other words, it's how the residents of Ontario refer to themselves. It's important to note that there aren't any rules for taking a city's name and turning it into a demonym. A demonym is informal and while the majority of Ontario may use one name, keep in mind that others may use something different.

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<2>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Ontario.

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<3>The elevation is an estimate for the area around Ontario - it will be higher in some places and lower in others.

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<4>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Ontario). When looking for a ZIP Code, whether Ontario or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

Our list of ZIP Codes for Ontario includes: 91758, 91761, 91764 & 91798.

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<5>Our distances are not driving distances, but are calculated as a 'point-to-point' distance starting from Ontario. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Ontario) to Point B.

If you need the driving distance, we recommend that you use one of the Mapping Services listed on our Map Page for Ontario. Since we usually use Google Maps for our own planning, we've provided the following link for your convenience: Google Map and Driving Directions starting from Ontario

Our distance measurements begin at a specific point in Ontario. The point that we are using is located at these GPS coordinates - Latitude: 34.0616, Longitude: -117.6511     [Map].

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This page was last modified: 15 Oct 2018
By John Hall