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Market insights · Indiana

Knox County, IN: growth, migration and housing

Knox County has 35,652 residents, down 1.7% since 2020 (-0.3% in the last year). In 2022–2023, 686 households moved in and 779 moved out (-93 net), while a net $7.5M of income left. Median household income is $61,237, the median home $137,700 and median rent $796 a month.

Population (2025)35,652
5-year growth-1.7%
1-year growth-0.3%
Net households moving in-93
Per 1,000 residents-2.6
Net income moving in-$7.5M
Median household income$61,237
Median home value$137,700
Median rent$796/mo
Rent as share of income16%

In Indiana: 86th of 92 counties for 5-year population growth · 80th of 92 counties for net in-migration (per resident) · 76th of 92 counties for median household income · 82nd of 92 counties for median home value.

Where new residents came from

Top counties by households (tax returns) moving to Knox County, 2022–2023 (IRS).

FromHouseholds (tax returns)Their income (AGI)
Daviess County, IN104$3.9M
Lawrence County, IL45$1.8M
Vanderburgh County, IN42$2.3M
Gibson County, IN39$1.5M
Sullivan County, IN37$1.6M
Greene County, IN20$0.7M
Pike County, IN20$0.8M

Where leavers went

Top counties by households leaving Knox County, 2022–2023 (IRS).

ToHouseholds (tax returns)Their income (AGI)
Daviess County, IN69$2.9M
Vanderburgh County, IN66$2.9M
Lawrence County, IL55$2.3M
Marion County, IN48$2.3M
Gibson County, IN46$2.1M
Sullivan County, IN32$1.6M
Pike County, IN23$1.0M
Vigo County, IN23$0.8M

BizyFi in Knox County

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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.