In 2018, Grundy County, IL had a population of 50.5k people with a median age of 37.6 and a median household income of $74,140. Between 2017 and 2018 the population of Grundy County, IL grew from 50,333 to 50,509, a 0.35% increase and its median household income grew from $71,598 to $74,140, a 3.55% increase.
The 5 largest ethnic groups in Grundy County, IL are White (Non-Hispanic) (86.5%), White (Hispanic) (7.16%), Other (Hispanic) (1.94%), Two+ (Non-Hispanic) (1.32%), and Black or African American (Non-Hispanic) (1.21%). 0% of the households in Grundy County, IL speak a non-English language at home as their primary language, and 98.8% of the residents in Grundy County, IL are U.S. citizens.
In 2018, the median property value in Grundy County, IL was $191,300, and the homeownership rate was 71.1%. Most people in Grundy County, IL drove alone to work, and the average commute time was 28.1 minutes. The average car ownership in Grundy County, IL was 2 cars per household.