| Official Name: | O'Brien, California |
| Pushpin Map: | California#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | California |
| Subdivision Type2: | County |
| Subdivision Name2: | Shasta |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Elevation Ft: | 1234 |
| Coordinates: | 40.8122°N -122.3242°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 96070 |
| Area Code: | 530 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1659769 |
O'Brien is an unincorporated community in Shasta County, California, United States. O'Brien is located along Interstate 5 16miles north of Redding. O'Brien has a post office with ZIP code 96070, which was established in 1945.[1] The community is named after Con O'Brien, who had a resort in the community.[2]