| Place Name | Swansea |
| Place Type | Village |
| ZIP Code(s) | 62208 62221 62223 62226 62269 |
| County | Saint Clair County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 13,495 |
| Population Growth Rate (2010-19) | 7.12% |
| Majority Ethnicity | White 72.27% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 12th |
| State House Districts | 113 |
| State Senate Districts | 57 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 72.27% |
| African American | 22.14% |
| Hispanic | 0.06% |
| Asian | 2.39% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.14% |