Round Lake is a city located in Minnesota. With a 2020 population of 359, it is the 558th largest city in Minnesota and the 14665th largest city in the United States. Round Lake is currently declining at a rate of -1.91% annually and its population has decreased by -4.52% since the most recent census, which recorded a population of 376 in 2010. Round Lake reached it's highest population of 380 in 2013. Spanning over 1 miles, Round Lake has a population density of 522 people per square mile.
The average household income in Round Lake is $54,513 with a poverty rate of 10.67%. The median rental costs in recent years comes to $619 per month, and the median house value is $57,500. The median age in Round Lake is 41.7 years, 32.5 years for males, and 51.7 years for females. For every 100 females there are 125.0 males.