Lennox 57039 Real EstateLennox is located in South Dakota. Lennox, South Dakota 57039has a population of 2,617. Lennox 57039 is less family-centric than the surrounding county with 41.03% of the households containing married families with children. The county average for households married with children is 42.53%. The median household income in Lennox, South Dakota 57039 is $59,516. The median household income for the surrounding county is $87,560 compared to the national median of $69,021. The median age of people living in Lennox 57039 is 38.1 years. Lennox WeatherThe average high temperature in July is 84.2 degrees, with an average low temperature in January of 6.8 degrees. The average rainfall is approximately 26.2 inches per year, with 36.5 inches of snow per year. Lennox MapReal estate near LennoxNearby CitiesNearby Cities Homes for Sale |