Westport
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 0.235
- State:
- South Dakota
Westport is a town located in Brown County, South Dakota. Westport has a 2026 population of 83. Westport is currently declining at a rate of -1.19% annually and its population has decreased by -4.6% since the most recent census, which recorded a population of 87 in 2020.
The median household income in Westport is $58,942 with a poverty rate of 0%. The median age in Westport is 56 years: 55.9 years for males, and 59.8 years for females. For every 100 females there are 181.8 males.