Jefferson 50129 Real EstateJefferson is located in Iowa. Jefferson, Iowa 50129has a population of 4,190. Jefferson 50129 is less family-centric than the surrounding county with 27.93% of the households containing married families with children. The county average for households married with children is 28.41%. The median household income in Jefferson, Iowa 50129 is $55,170. The median household income for the surrounding county is $52,529 compared to the national median of $57,652. The median age of people living in Jefferson 50129 is 47.8 years. Jefferson WeatherThe average high temperature in July is 84.9 degrees, with an average low temperature in January of 10.3 degrees. The average rainfall is approximately 35.2 inches per year, with 30.4 inches of snow per year. Jefferson MapReal estate near JeffersonNearby CitiesNearby Cities Homes for Sale |