| Place Name | Irwin |
| Place Type | Census Designated Place |
| ZIP Code(s) | 29720 |
| County | Lancaster County |
| Area Code(s) | 803 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 1,477 |
| Population Growth Rate (2010-19) | -5.98% |
| Majority Ethnicity | White 64.35% |
| Metro/Micro Stats Area | Charlotte-Concord-Gastonia, NC-SC |
| US Congressional District(s) | South Carolina 5th |
| State House Districts | 44 |
| State Senate Districts | 16 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 64.35% |
| African American | 33.89% |
| Hispanic | 1.75% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |