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Knox County, Illinois

Knox County, Illinois · ZIP 61401, 61402, 61410

  • Census data · ACS 2019-2023
Browse the 36 townsFind my townSponsor a town here
  • 48,716 (2024 estimate)Population
  • 20,765Households
  • $53,291Median household income
  • $104,900Median home value
  • 36Towns with a page
  • 22ZIP codes

Knox County in numbersOfficial sources, refreshed yearly

Population, 2000 to 2020−10.5%
48k50k52k54k56k2000: 55,83620002010: 52,91920102020: 49,967202055,83649,967
Population of Knox County at each census
CensusPopulation
200055,836
201052,919
202049,967

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2000 Summary File 1: total population, county level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 17, retrieved November 14, 2026.

Household income in Knox County
Under $50k47.3%
$50k to $100k30.6%
$100k to $150k14.1%
$150k to $200k5.1%
$200k and over2.8%

Median household income $53,291 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 17, retrieved November 14, 2026.

Housing tenure in Knox County
Owner occupied
14,490 units
Renter occupied
6,275 units
Vacancy rate
12.7%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, county level, state 17, retrieved November 14, 2026.

Jobs by sector in Knox County2023
Retail trade3,259
Health care and social assistance2,853
Accommodation and food services1,552
Manufacturing1,501
Educational services974
Wholesale trade676
Other services (except public administration)614
Administrative and support and waste management and remediation services439

14,242 employees in 968 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.

Source: County Business Patterns 2023: employment by sector, county level, state 17, retrieved November 14, 2026.

Knox County compared with its state
Knox County compared with its state, American Community Survey 2019-2023
MeasureKnox CountyIllinois
Population49,29412,692,653
Median household income$53,291$81,702
Median age42.438.9
Median home value$104,900$250,500
Bachelor’s degree or higher20.3%37.2%
Foreign-born residents3.3%14.4%
Owner-occupied homes69.8%66.8%
Mean commute to work20.6 minutes28.1 minutes

Source: American Community Survey 5-year data profile 2019–2023, county level, state 17, retrieved November 14, 2026.

Townships, towns and villages in Knox County36 with a page · sort by any column

Type
GalesburgCity29,28917.8 sq mi
Knox TownshipTownship4,84035.4 sq mi
Cedar TownshipTownship2,98036.0 sq mi
AbingdonCity2,8711.42 sq mi
KnoxvilleCity2,8402.35 sq mi
Indian Point TownshipTownship1,40636.1 sq mi
Henderson TownshipTownship1,11433.8 sq mi
Persifer TownshipTownship1,06334.7 sq mi
Sparta TownshipTownship1,03436.1 sq mi
Salem TownshipTownship92235.8 sq mi
Ontario TownshipTownship89636.2 sq mi
Truro TownshipTownship83535.7 sq mi
East GalesburgVillage7441.37 sq mi
WatagaVillage7230.83 sq mi
Oak RunCensus designated place7224.28 sq mi
OneidaCity6810.76 sq mi
Walnut Grove TownshipTownship66035.6 sq mi
Yates CityVillage6370.49 sq mi
WilliamsfieldVillage5571.23 sq mi
Orange TownshipTownship51436.2 sq mi
Rio TownshipTownship50336.1 sq mi
Maquon TownshipTownship45235.9 sq mi
AltonaVillage4510.94 sq mi
Galesburg TownshipTownship38421.4 sq mi
Copley TownshipTownship38235.1 sq mi
Victoria TownshipTownship36235.0 sq mi
Haw Creek TownshipTownship34935.8 sq mi
Lynn TownshipTownship26135.3 sq mi
VictoriaVillage2590.45 sq mi
HendersonVillage2570.27 sq mi
Elba TownshipTownship25036.3 sq mi
Chestnut TownshipTownship22036.2 sq mi
MaquonVillage2150.16 sq mi
RioVillage2050.31 sq mi
GilsonCensus designated place1490.33 sq mi
St. AugustineVillage1140.59 sq mi

Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 17 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.

County officialsFrom public records

No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.

Across Knox County

Jobs across Knox County

No job is posted in Knox County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.

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Events in the next 31 days

No upcoming event is listed in Knox County's towns yet. Members and businesses add events from any town page.

Latest postsRolled up from the towns

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Neighboring counties

Neighboring counties

Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 17, retrieved November 14, 2026.