Waterloo
- County:
- Laurens County
- County Seat:
- No
- Area (mi²):
- 1.783
- State:
- South Carolina
Waterloo is a town located in Laurens County, South Carolina. Waterloo has a 2026 population of 156. Waterloo is currently growing at a rate of 2.63% annually and its population has increased by 4% 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.