| Place Name | Plymouth |
| Place Type | City |
| ZIP Code(s) | 95669 |
| County | Amador County |
| Area Code(s) | 209 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 1,328 |
| Population Growth Rate (2010-19) | 7.26% |
| Majority Ethnicity | White 73.07% |
| US Congressional District(s) | California 4th |
| State Assembly Districts | 5 |
| State Senate Districts | 8 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 73.07% |
| African American | 0% |
| Hispanic | 1.05% |
| Asian | 0.88% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 25% |