In 2021, Marietta, IL had a population of 82 people with a median age of 40.5 and a median household income of $45,000. Between 2020 and 2021 the population of Marietta, IL grew from 61 to 82, a 34.4% increase and its median household income declined from $48,750 to $45,000, a −7.69% decrease.
The 5 largest ethnic groups in Marietta, IL are White (Non-Hispanic) (100%), White (Hispanic) (0%), Black or African American (Non-Hispanic) (0%), Black or African American (Hispanic) (0%), and American Indian & Alaska Native (Non-Hispanic) (0%).
None of the households in Marietta, IL 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.
100% of the residents in Marietta, IL are U.S. citizens.
In 2021, the median property value in Marietta, IL was $48,300, and the homeownership rate was 97.2%.
Most people in Marietta, IL drove alone to work, and the average commute time was 26.6 minutes. The average car ownership in Marietta, IL was 3 cars per household.