New Effington
- County:
- Roberts County
- County Seat:
- No
- Area (mi²):
- 0.261
- State:
- South Dakota
New Effington is a town located in Roberts County, South Dakota. New Effington has a 2026 population of 228. New Effington is currently growing at a rate of 0.88% annually but its population has decreased by -2.15% since the most recent census, which recorded a population of 233 in 2020.
The median household income in New Effington is $50,208 with a poverty rate of 20.7%. The median age in New Effington is 32.5 years: 33.7 years for males, and 31.3 years for females. For every 100 females there are 106.9 males.