
St. Lucas
- County:
- Fayette County
- County Seat:
- No
- Area (mi²):
- 0.254
- State:
- Iowa
St. Lucas is a city located in Fayette County, Iowa. St. Lucas has a 2025 population of 167. St. Lucas 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 167 in 2020.
The average household income in St. Lucas is $81,329 with a poverty rate of 7.53%. The median age in St. Lucas is 32 years: 30.4 years for males, and 33.2 years for females.