Ipswich
- County:
- Edmunds County
- County Seat:
- No
- Area (mi²):
- 1.34
- State:
- South Dakota
Ipswich is a city located in Edmunds County, South Dakota. Ipswich has a 2026 population of 931. Ipswich is currently declining at a rate of -1.17% annually but its population has increased by 0.54% since the most recent census, which recorded a population of 926 in 2020.