| Official Name: | Vernalis, California |
| Pushpin Map: | California#USA |
| Pushpin Label: | Vernalis |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | California |
| Subdivision Type2: | County |
| Subdivision Name2: | San Joaquin |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Elevation Ft: | 105 |
| Coordinates: | 37.6308°N -121.2872°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 95385 |
| Area Code: | 209 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 252823 |
Vernalis is an unincorporated community in San Joaquin County, California, United States. Vernalis is located on California State Route 33 10.5miles southeast of Tracy. It was named after two daughters of local ranchers: Verna Carpenter and Alice Hamilton.[1] Vernalis has a post office with ZIP code 95385.[2] The first post office in the area opened in San Joaquin City in 1851; that post office closed in 1852, reopened in 1874, and was moved 3miles southwest in 1888, after which its name was changed to Vernalis (Latin for springlike, related to the spring).[3]
During World War II, Vernalis was home to the Naval Auxiliary Air Station Vernalis, Vernalis Reconditioning Center and Vernalis Prisoner of War Branch Camp.