Belle Plaine is a city located in Sumner County Kansas. Belle Plaine has a 2020 population of 3,076. Belle Plaine is currently declining at a rate of -0.71% annually and its population has decreased by -6.39% since the most recent census, which recorded a population of 3,286 in 2010. Belle Plaine reached it's highest population of 3,286 in 2010.
The average household income in Belle Plaine is $69,225 with a poverty rate of 6.83%. The median rental costs in recent years comes to $795 per month, and the median house value is $90,600. The median age in Belle Plaine is 42.5 years, 43.4 years for males, and 41.1 years for females.