Carter Lake Real EstateCarter Lake is located in Iowa. Carter Lake, Iowa has a population of 3,781. Carter Lake is less family-centric than the surrounding county with 23.05% of the households containing married families with children. The county average for households married with children is 27.41%. The median household income in Carter Lake, Iowa is $62,966. The median household income for the surrounding county is $56,291 compared to the national median of $57,652. The median age of people living in Carter Lake is 39.5 years. Carter Lake WeatherThe average high temperature in July is 87.3 degrees, with an average low temperature in January of 13.6 degrees. The average rainfall is approximately 32.1 inches per year, with 26.4 inches of snow per year. Carter Lake MapReal estate near Carter LakeNearby CitiesNearby Cities Homes for Sale |