In 2021, Williamson, IL had a population of 173 people with a median age of 48.4 and a median household income of $51,346. Between 2020 and 2021 the population of Williamson, IL declined from 202 to 173, a −14.4% decrease and its median household income grew from $46,875 to $51,346, a 9.54% increase.
The 5 largest ethnic groups in Williamson, IL are White (Non-Hispanic) (94.8%), Two+ (Non-Hispanic) (1.73%), Two+ (Hispanic) (1.73%), White (Hispanic) (1.16%), and Asian (Non-Hispanic) (0.578%).
None of the households in Williamson, 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 Williamson, IL are U.S. citizens.
In 2021, the median property value in Williamson, IL was $55,000, and the homeownership rate was 74.4%.
Most people in Williamson, IL drove alone to work, and the average commute time was 29.2 minutes. The average car ownership in Williamson, IL was 2 cars per household.