| Place Name | Decatur |
| Place Type | City |
| ZIP Code(s) | 35601 35603 |
| County | Morgan County Limestone County |
| Area Code(s) | 256,938 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 55,664 |
| Population Growth Rate (2010-19) | 4.05% |
| Majority Ethnicity | White 63.23% |
| Metro/Micro Stats Area | Decatur, ALHuntsville, AL |
| US Congressional District(s) | Alabama 5th |
| State House Districts | 4,7,8 |
| State Senate Districts | 3 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 63.23% |
| African American | 22.5% |
| Hispanic | 0.12% |
| Asian | 0.34% |
| Native American | 0.06% |
| Hawaiin/Pacific Islander | 13.74% |