
Thornburg
- County:
- Keokuk County
- County Seat:
- No
- Area (mi²):
- 0.199
- State:
- Iowa
Thornburg is a city located in Keokuk County, Iowa. Thornburg has a 2025 population of 47. Thornburg is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 47 in 2020.
The average household income in Thornburg is $47,314 with a poverty rate of 13.95%. The median age in Thornburg is 60.5 years: 68.4 years for males, and 53 years for females.