Waubay
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 1.456
- State:
- South Dakota
Waubay is a city located in Day County, South Dakota. Waubay has a 2026 population of 474. Waubay is currently declining at a rate of -0.21% annually and its population has decreased by 0% since the most recent census, which recorded a population of 474 in 2020.
The median household income in Waubay is $36,389 with a poverty rate of 24.33%. The median age in Waubay is 53.3 years: 45.8 years for males, and 56.4 years for females. For every 100 females there are 80.2 males.