In 2023, Marathon, IA had a population of 199 people with a median age of 55.4 and a median household income of $40,417. Between 2022 and 2023 the population of Marathon, IA declined from 204 to 199, a −2.45% decrease and its median household income grew from $38,750 to $40,417, a 4.3% increase.
The 5 largest ethnic groups in Marathon, IA are White (Non-Hispanic) (83.9%), Two+ (Non-Hispanic) (10.1%), White (Hispanic) (3.02%), Other (Hispanic) (3.02%), and Black or African American (Non-Hispanic) (0%).
None of the households in Marathon, IA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
97% of the residents in Marathon, IA are U.S. citizens.
In 2023, the median property value in Marathon, IA was $41,700, and the homeownership rate was 90.1%.
Most people in Marathon, IA drove alone to work, and the average commute time was 29.5 minutes. The average car ownership in Marathon, IA was 2 cars per household.