Janesville is a city located in Minnesota. With a 2020 population of 2,257, it is the 245th largest city in Minnesota and the 7170th largest city in the United States. Janesville is currently declining at a rate of -0.09% annually but its population has increased by 0.04% since the most recent census, which recorded a population of 2,256 in 2010. Janesville reached it's highest population of 2,261 in 2018. Spanning over 2 miles, Janesville has a population density of 1,290 people per square mile.
The average household income in Janesville is $78,337 with a poverty rate of 8.50%. The median rental costs in recent years comes to $658 per month, and the median house value is $135,000. The median age in Janesville is 33.4 years, 31.9 years for males, and 36 years for females. For every 100 females there are 99.9 males.