Marble Rock Real EstateMarble Rock is located in Iowa. Marble Rock, Iowa has a population of 304. Marble Rock is less family-centric than the surrounding county with 24.42% of the households containing married families with children. The county average for households married with children is 26.96%. The median household income in Marble Rock, Iowa is $46,875. The median household income for the surrounding county is $48,607 compared to the national median of $57,652. The median age of people living in Marble Rock is 50.3 years. Marble Rock WeatherThe average high temperature in July is 82.5 degrees, with an average low temperature in January of 8.8 degrees. The average rainfall is approximately 35.4 inches per year, with 36.4 inches of snow per year. Marble Rock MapReal estate near Marble RockNearby CitiesNearby Cities Homes for Sale |