| Place Name | St. Johnsville |
| Place Type | Village |
| ZIP Code(s) | 13452 |
| County | Montgomery County |
| Area Code(s) | 518,838 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 1,548 |
| Population Growth Rate (2010-19) | -5.14% |
| Majority Ethnicity | White 94.45% |
| Metro/Micro Stats Area | Amsterdam, NY |
| US Congressional District(s) | New York 19th |
| State Assembly Districts | 111 |
| State Senate Districts | 46 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.45% |
| African American | 0% |
| Hispanic | 0.05% |
| Asian | 1.15% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.34% |