In 2020, Grundy County, IL had a population of 50.8k people with a median age of 38.1 and a median household income of $75,767. Between 2019 and 2020 the population of Grundy County, IL grew from 50,666 to 50,798, a 0.261% increase and its median household income declined from $77,350 to $75,767, a −2.05% decrease.
The 5 largest ethnic groups in Grundy County, IL are White (Non-Hispanic) (85.7%), White (Hispanic) (7.17%), Other (Hispanic) (1.94%), Two+ (Non-Hispanic) (1.76%), and Black or African American (Non-Hispanic) (1.13%).
None of the households in Grundy County, 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.
98.4% of the residents in Grundy County, IL are U.S. citizens.
In 2020, the median property value in Grundy County, IL was $199,800, and the homeownership rate was 72.8%. Most people in Grundy County, IL drove alone to work, and the average commute time was 29.1 minutes. The average car ownership in Grundy County, IL was 2 cars per household.