the average family size was 3.03. In the city, the population was spread out, with 25.5% under the age of 18, 8.7% from 18 to 24, 29.5% from 25 to 44, 22.1% from 45 to 64, and 14.1% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 84.0 males. For every 100 females age 18 and over, there were 98.2 males. As of 2000 the median income for a household was $31,875, and the median income for a family was $36,806. Males had a median income of $26,406 versus $23,750 for females. The per capita income for the city was $13,998. There were 8.1% of families and 9.8% of the population living below the poverty line, including 8.3% of under eighteens and none of those over 64. Education Marne is within the Atlantic Community School District. Atlantic High School is the local school district. References External links City of Marne Seven Towns Where Land Is Free; CNBC.com; November 17, 2010 Cities in Cass County, Iowa Cities in Iowa