| Ontario County Courthouse | |
| Map Type: | New York |
| Mapframe: | yes |
| Mapframe-Marker: | building |
| Mapframe-Zoom: | 12 |
| Mapframe-Caption: | Interactive map showing the location of Ontario County Courthouse |
| Location: | 27 N Main Street Canandaigua, New York |
| Coordinates: | 42.8886°N -77.2813°W |
| Built: | 1858 |
| Added: | 1984 |
| Refnum: | 84002856 |
| Increase Refnum: | 16000345[1] |
The Ontario County Courthouse is located in Canandaigua, New York, United States. The United States v. Susan B. Anthony trial took place in this courthouse in 1873. It is a contributing property to the Canandaigua Historic District, listed on the National Register of Historic Places in 1984.