
Waterloo
- County:
- DeKalb County
- County Seat:
- No
- Area (mi²):
- 2.11
- State:
- Indiana
Waterloo is a town located in DeKalb County, Indiana. Waterloo has a 2025 population of 2,187. Waterloo is currently growing at a rate of 0.69% annually and its population has increased by 3.55% since the most recent census, which recorded a population of 2,112 in 2020.
The average household income in Waterloo is $68,254 with a poverty rate of 16.42%. The median age in Waterloo is 33.5 years: 35.4 years for males, and 33.2 years for females.