| Place Name | St. Martins |
| Place Type | City |
| ZIP Code(s) | 65023 65109 |
| County | Cole County |
| Area Code(s) | 573 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 1,136 |
| Population Growth Rate (2010-19) | 4.47% |
| Majority Ethnicity | White 97.73% |
| Metro/Micro Stats Area | Jefferson City, MO |
| US Congressional District(s) | Missouri 3rd |
| State House Districts | 59 |
| State Senate Districts | 6 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.73% |
| African American | 0% |
| Hispanic | 0.42% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.85% |