
Lannon
- County:
- Waukesha County
- County Seat:
- No
- Area (mi²):
- 2.472
- State:
- Wisconsin
Lannon is a village located in Waukesha County, Wisconsin. Lannon has a 2025 population of 2,906. Lannon is currently growing at a rate of 11.86% annually and its population has increased by 112.74% since the most recent census, which recorded a population of 1,366 in 2020.
The average household income in Lannon is $117,514 with a poverty rate of 5.9%. The median age in Lannon is 41.9 years: 42.5 years for males, and 39.4 years for females.