In 2021, Seneca, IL had a population of 2.65k people with a median age of 32.8 and a median household income of $85,294. Between 2020 and 2021 the population of Seneca, IL grew from 2,534 to 2,648, a 4.5% increase and its median household income grew from $74,907 to $85,294, a 13.9% increase.
The 5 largest ethnic groups in Seneca, IL are White (Non-Hispanic) (88%), White (Hispanic) (3.51%), Two+ (Hispanic) (2.64%), Two+ (Non-Hispanic) (2.61%), and Other (Hispanic) (1.81%).
None of the households in Seneca, 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 Seneca, IL are U.S. citizens.
In 2021, the median property value in Seneca, IL was $169,900, and the homeownership rate was 81.2%.
Most people in Seneca, IL drove alone to work, and the average commute time was 28.7 minutes. The average car ownership in Seneca, IL was 2 cars per household.