Bridgewater
- County:
- McCook County
- County Seat:
- No
- Area (mi²):
- 34.559
- State:
- South Dakota
Bridgewater is located in McCook County, South Dakota. Bridgewater has a 2025 population of 122 . Bridgewater is currently declining at a rate of -0.81% annually but its population has increased by 4.27% since the most recent census, which recorded a population of 117 in 2020.
The median age in Bridgewater is 6.9 years: 25.6 years for males, and 6.8 years for females. For every 100 females there are 76.5 males.