| Official Name: | New California, Ohio |
| Settlement Type: | Census-designated place |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Union |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 5.41 |
| Area Land Km2: | 5.33 |
| Area Water Km2: | 0.08 |
| Area Total Sq Mi: | 2.09 |
| Area Land Sq Mi: | 2.06 |
| Area Water Sq Mi: | 0.03 |
| Population As Of: | 2020 |
| Population Total: | 2225 |
| Population Density Km2: | 417.42 |
| Population Density Sq Mi: | 1081.15 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 978 |
| Coordinates: | 40.1517°N -83.245°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 43064 |
| Area Code: | 614 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2628939 |
New California is a census-designated place in central Jerome Township, Union County, Ohio, United States. It is located at the intersection of U.S. Route 42 and Industrial Parkway, just south of 42's intersection with U.S. Route 33.[2] The population was 2,225 at the 2020 census.
New California was platted in 1853.[3] According to tradition, news of a man passing through the settlement to California caused the name to be selected.[4] The New California Post office was established on January 7, 1850, but was discontinued on May 14, 1904. The mail service is now sent through the Plain City branch.
On September 19, 2009, a new Ohio historical marker was dedicated in New California. The marker symbolizes the fact that 367 men from Jerome Township joined the Union cause, giving it one of the highest per capita rates for service in the nation during the American Civil War, and also the fact that seventeen of those veterans are buried in the community's small cemetery.[5]