| Place Name | Le Mars |
| Place Type | City |
| ZIP Code(s) | 51031 |
| County | Plymouth County |
| Area Code(s) | 712 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 9,765 |
| Population Growth Rate (2010-19) | 7.58% |
| Majority Ethnicity | White 88.51% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 5 |
| State Senate Districts | 3 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 88.51% |
| African American | 3.29% |
| Hispanic | 0.27% |
| Asian | 0.45% |
| Native American | 0.66% |
| Hawaiin/Pacific Islander | 6.82% |