| Place Name | Waterloo |
| Place Type | Town |
| ZIP Code(s) | 35677 |
| County | Lauderdale County |
| Area Code(s) | 256,938 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 118 |
| Population Growth Rate (2010-19) | -12.32% |
| Majority Ethnicity | White 98.31% |
| Metro/Micro Stats Area | Florence-Muscle Shoals, AL |
| US Congressional District(s) | Alabama 5th |
| State House Districts | 18 |
| State Senate Districts | 6 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.31% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.69% |