Waterloo is a town located in Laurens County, South Carolina. Waterloo has a 2026 population of 159. Waterloo is currently growing at a rate of 1.27% annually and its population has increased by 6% since the most recent census, which recorded a population of 150 in 2020.
The median age in Waterloo is 49 years: 40.5 years for males, and 49.4 years for females. For every 100 females there are 143.7 males.
Data after 2023 is projected based on recent change
Overall: 49 years
Female: 49.4 years
Male: 40.5 years
There are 158 adults, (57 of whom are seniors) in Waterloo.
Female: 87 (41%)
Male: 125 (59%)
The racial composition of Waterloo includes 86.79% Black or African American, 7.55% White, and smaller percentages for Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Black or African American | 184 | 86.79% |
| White | 16 | 7.55% |
| Two or more races | 7 | 3.3% |
| Asian | 5 | 2.36% |