| Population | 38 (2010), see rank |
| House Units | 22, see rank |
| Race | Whites:94.7%, Hispanics:0%, Blacks:2.6%, Asians:0%, Others:2.6% |
| Total Area: | 2.54 sq mi |
| Water Area: | 0.00 sq mi (0.00%) |
| State: | California |
| Area: | San Francisco-Oakland-Fremont, CA |
| County: | Marin County |
| City: | Nicasio |
| Census Tract: | 133000 |
| Census Block Group: | 133000-2 |