Self-guided · principal city, California
Historic Courthouses in Ontario, CA
County courthouses on the register near you, usually the grandest building in town and the center of its history.
Ontario is one of the cities the Riverside–San Bernardino–Ontario, CA metro area is officially named after. Buildings like these are easy to drive past because they are still in use. The register listing is what tells you why they matter.

On the record near Ontario, CA
The 7 nearest
7 listed sites on the record match historic courthouses within 200 miles of Ontario, CA, out of 158 listed sites of every kind within 25 miles.
- San Bernardino County Court House21 miles from the center of Ontario · Building · San Bernardino · listed 1998National Register of Historic Places
- Orange County Courthouse25 miles from the center of Ontario · Building · Santa Ana · listed 1977National Register of Historic Places
- Ventura County Courthouse95 miles from the center of Ontario · Building · Ventura · listed 1971National Register of Historic Places
- U.S. Courthouse97 miles from the center of Ontario · Building · San Diego · listed 1975National Register of Historic Places
- Inyo County Courthouse192 miles from the center of Ontario · Building · Independence · listed 1998National Register of Historic Places
- Kings County Courthouse193 miles from the center of Ontario · Building · Hanford · listed 1978National Register of Historic Places
- Yuma County Courthouse198 miles from the center of Ontario · Building · Yuma · listed 1982National Register of Historic Places
Distances are straight-line from the center of Ontario, CA. Many sites are private property or working buildings - view them from the public way. See them on the map.
Historic Courthouses in Ontario, step by step
- 1
See every listed site of this kind in the area
- 2
Sort by distance and pick the closest few
- 3
Read the record for the year, the builder and the use
- 4
View from the public way and note what has changed
- 5
Collect the set and move on to the next county
What people in Ontario, CA ask first
How much does it cost to visit these sites in Ontario, CA?
Most listed sites can be seen from a public road or sidewalk at no cost, and the app is free to use. Some sites are private homes, working churches or museums with their own hours and fees. The record for each one says what it is, so you know before you go.
Where does the information on these sites come from?
From published records: the National Register of Historic Places, the Recorded Texas Historic Landmark program, and the Georgia Historical Society and Georgia Department of Natural Resources marker program. Every site on the page names its source.
Are these buildings open to the public?
Some are, many are not. Churches, courthouses and libraries usually keep regular hours. Houses, barns and mills are often private and best seen from the road. The record for each site tells you which kind it is.
What does it mean when a site is on the National Register?
It means the property was documented and accepted as historically significant. Listing honors the site, it does not open it to visitors or stop an owner from using it.
How a visit works in Ontario
- Step 1
Find the place
Every stop starts as a pin with real coordinates. In Ontario, CA the map shows what is listed around you and how far each one is, so the first decision is where to go, and it takes a few seconds.
- Step 2
Read the story
The record behind each marker is kept whole: what happened there, when, who was involved, and why it was worth a sign. You read it standing where it happened, which is the part a textbook cannot give you.
- Step 3
Get there under your own power
Walk it, run it, hike it, ride it or drive it. Stops in Ontario, CA are chained into routes that fit the way you move, so a lunch break, a long run or a Saturday drive can all pass through history.
- Step 4
Collect it and come back
Each stop you reach counts toward a badge, and a photo or a correction you send makes the record better for the next person. The map remembers where you have been, so the next trip starts where the last one ended.
The rules that make it work
The record comes first
Every site on these pages comes from a published register or marker program, with its source named. Nothing is listed that is not on the record.
Read the whole story
A marker is a few lines on a post. The story behind it is longer, and it includes the hard parts. Both are worth the stop.
Movement makes it stick
People remember the places they walked to. A route through five markers teaches more than fifty marker pages read on a couch.
Local beats famous
The marker two streets over usually has a better story than the one in the guidebook, and nobody else is standing in front of it.
Respect the ground
Many sites are private homes, working churches or cemeteries. View from the public way, follow posted hours, and leave it as you found it.
Every visitor can improve it
Markers go missing, get moved, or carry mistakes. A photo or a location fix from the person standing there is how the record stays right.
More ways in around Ontario, CA
Historic Courthouses near Ontario
- Historic Courthouses in Upland, CA
- Historic Courthouses in Montclair, CA
- Historic Courthouses in Chino, CA
- Historic Courthouses in Rancho Cucamonga, CA
- Historic Courthouses in Pomona, CA
- Historic Courthouses in Chino Hills, CA
- Historic Courthouses in Eastvale, CA
- Historic Courthouses in Diamond Bar, CA
- Historic Courthouses in Jurupa Valley, CA
- Historic Courthouses in Fontana, CA
