| Place Name | Monte Rio |
| Place Type | Census Designated Place |
| ZIP Code(s) | 95462 |
| County | Sonoma County |
| Area Code(s) | 707 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 1,171 |
| Population Growth Rate (2010-19) | -6.25% |
| Majority Ethnicity | White 90.1% |
| Metro/Micro Stats Area | Santa Rosa-Petaluma, CA |
| US Congressional District(s) | California 2nd |
| State Assembly Districts | 2 |
| State Senate Districts | 2 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 90.1% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 1.67% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 8.23% |