who were 65 years of age or older. The median age was 56 years. For every 100 females, there were 89.7 males. For every 100 females age 18 and over, there were 92.6 males. The median income for a household in the city was $31,250, and the median income for a family was $40,833. Males had a median income of $30,625 versus $40,625 for females. The per capita income for the city was $21,214. None of the population and none of the families were below the poverty line. Education Public schools are operated by the Clayton Ridge Community School District, which formed in 2005 in the merger of the Guttenberg Community School District and the Garnavillo Community School District. Students were previously zoned to Garnavillo schools. References Cities in Iowa Iowa populated places on the Mississippi River Cities in Clayton County, Iowa 1849 establishments in Iowa Populated places established in 1849