
Aberdeen
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 16.517
- State:
- South Dakota
Aberdeen is a city located in Brown County, South Dakota. Aberdeen has a 2025 population of 27,895. Aberdeen is currently declining at a rate of -0.38% annually and its population has decreased by -1.89% since the most recent census, which recorded a population of 28,432 in 2020.
The average household income in Aberdeen is $81,636 with a poverty rate of 12.87%. The median age in Aberdeen is 35.8 years: 35.2 years for males, and 36.9 years for females.