Mellette
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 0.256
- State:
- South Dakota
Mellette is a city located in Spink County, South Dakota. Mellette has a 2026 population of 193. Mellette is currently declining at a rate of -0.52% annually and its population has decreased by -2.53% since the most recent census, which recorded a population of 198 in 2020.
The median household income in Mellette is $106,964 with a poverty rate of 10.05%. The median age in Mellette is 39.4 years: 39.8 years for males, and 34.8 years for females. For every 100 females there are 82.6 males.