
Martin
- County:
- Bennett County
- County Seat:
- No
- Area (mi²):
- 0.56
- State:
- South Dakota
Martin is a city located in Bennett County, South Dakota. Martin has a 2025 population of 919. Martin is currently declining at a rate of -0.33% annually and its population has decreased by -1.82% since the most recent census, which recorded a population of 936 in 2020.
The average household income in Martin is $64,299 with a poverty rate of 14.72%. The median age in Martin is 34.6 years: 35.7 years for males, and 32.2 years for females.