St. Clair is a city located in Blue Earth County Minnesota. With a 2020 population of 810, it is the 381st largest city in Minnesota and the 11219th largest city in the United States . St. Clair is currently declining at a rate of -0.86% annually and its population has decreased by -6.68% since the most recent census, which recorded a population of 868 in 2010. St. Clair reached it's highest population of 868 in 2010. Spanning over 1 miles, St. Clair has a population density of 1,216 people per square mile.
The average household income in St. Clair is $78,093 with a poverty rate of 3.45%. The median rental costs in recent years comes to $633 per month, and the median house value is $149,100. The median age in St. Clair is 31.5 years, 31.6 years for males, and 31.1 years for females.