Population Demographics
As of 2025 the population of Lake Mills is 2,213. The population is expected to shrink to 2,193 by 2030 - a growth rate of -0.18%.
The median age of Lake Mills residents is 46.
The diversity index of Lake Mills is 31.9, meaning that there is a 32% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.