Janesville is a city located in Waseca County Minnesota. With a 2020 population of 2,240, it is the 246th largest city in Minnesota and the 7191st largest city in the United States . Janesville is currently declining at a rate of -0.27% annually and its population has decreased by -0.71% since the most recent census, which recorded a population of 2,256 in 2010. Janesville reached it's highest population of 2,261 in 2011. Spanning over 2 miles, Janesville has a population density of 1,280 people per square mile.
The average household income in Janesville is $73,340 with a poverty rate of 12.04%. The median rental costs in recent years comes to $763 per month, and the median house value is $140,800. The median age in Janesville is 32.9 years, 32.1 years for males, and 33.8 years for females.