
Rapid Valley
- County:
- Pennington County
- County Seat:
- No
- Area (mi²):
- 6.468
- State:
- South Dakota
Rapid Valley is a CDP located in Pennington County, South Dakota. Rapid Valley has a 2025 population of 7,090. Rapid Valley is currently declining at a rate of -1.09% annually and its population has decreased by -17.11% since the most recent census, which recorded a population of 8,553 in 2020.
The average household income in Rapid Valley is $89,376 with a poverty rate of 6.85%. The median age in Rapid Valley is 42.6 years: 38.6 years for males, and 45 years for females.