In 2023, Jo Daviess County, IL had a population of 21.9k people with a median age of 50.9 and a median household income of $74,954. Between 2022 and 2023 the population of Jo Daviess County, IL declined from 21,942 to 21,918, a −0.109% decrease and its median household income grew from $67,729 to $74,954, a 10.7% increase.
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None of the households in Jo Daviess 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.
Most people in Jo Daviess County, IL drove alone to work, and the average commute time was 21.3 minutes. The average car ownership in Jo Daviess County, IL was 2 cars per household.
Jo Daviess County, IL borders Carroll County, IL, Stephenson County, IL, Dubuque County, IA, Jackson County, IA, Grant County, WI, and Lafayette County, WI.