under the age of 18, 5.9% from 18 to 24, 29.4% from 25 to 44, 25.9% from 45 to 64, and 16.5% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 102.4 males. For every 100 females age 18 and over, there were 94.1 males. The median income for a household in the city was $40,714, and the median income for a family was $42,917. Males had a median income of $28,750 versus $16,719 for females. The per capita income for the city was $17,523. None of the families and 1.1% of the population were living below the poverty line, including no under eighteens and 4.4% of those over 64. Education Rock Falls' public schools are operated by the Central Springs Community School District, established on July 1, 2011, by the merger of North Central Community School District and Nora Springs–Rock Falls Community School District. References Cities in Cerro Gordo County, Iowa Cities in Iowa Mason City, Iowa micropolitan area