• county
  • FIPS 39083
  • Largest town: Mount Vernon

Knox County, Ohio

Knox County had 63,848 residents in the Census Vintage 2024 estimate, on 525.5 square miles of land. It ranks 40th of 88 in Ohio by population and 21st by land area.

Population
63,848
#40 of 88 in Ohio · #855 in US
Area
525.5 sq mi
#21 of 88 in Ohio · #1,991 in US
Density
121 / sq mi
#44 of 88 in Ohio · #793 in US
Median household income
$66,844
#42 of 88 in Ohio · #1,223 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Knox County within Ohio. Pin: Columbus.

Measure from here

Tools and pages that start from Knox County

Knox County population, land area and income

Knox County had 63,848 residents in the Census Vintage 2024 estimate, on 525.5 square miles of land. It ranks 40th of 88 in Ohio by population and 21st by land area. That works out to 121.5 people per square mile, 1.3 times the US average of 96.3, and above the national county median.

The median county-equivalent in Ohio has 58,250 residents, about the same as Knox County.

Its SAIPE 2023 median household income of $66,844 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

63,848

3144th1st

855th of 3,144 (US)

Land area

526 sq mi

3144th1st

1991st of 3,144 (US)

Density

121.5 / sq mi

3144th1st

793rd of 3,144 (US)

Median household income

$66,844

3143rd1st

1223rd of 3,143 (US)

Rank within Ohio (88)

Population

63,848

88th1st

40th of 88 (OH)

Land area

526 sq mi

88th1st

21st of 88 (OH)

Density

121.5 / sq mi

88th1st

44th of 88 (OH)

Median household income

$66,844

88th1st

42nd of 88 (OH)

How Knox County's population changed since 2020

Knox County gained 1,056 residents between the July 2020 and July 2024 estimates, a rise of 1.7%. That ranks 15th of 88 in Ohio for growth. The median Ohio county changed by -0.2%, and the state as a whole by +0.7%.

Since the April 2020 estimates base, Knox County recorded 3,069 births and 3,212 deaths, a natural change of -143. Net international migration added +344 and net domestic migration, people moving to or from other US counties, came to +893. The largest single component was domestic migration, which added 893 people.

62.8k202062.5k202163.2k202263.3k202363.8k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
3,069
Deaths
3,212
Net international migration
+344
Net domestic migration
+893
Change, July 2023 to July 2024
+504

Where Knox County is

The Census internal point of Knox County is at 40.403600, -82.422400. It sits in UTM zone 17N. The map shades Ohio's 88 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Knox County outlined. Dots are towns of 1,000+ people with residents in it.

Shelby County: -0.4%Defiance County: +1.0%Darke County: -0.8%Seneca County: -0.6%Wood County: +0.6%Fayette County: -0.7%Clark County: -0.7%Hocking County: -2.2%Jackson County: +0.2%Miami County: +2.7%Richland County: -0.1%Union County: +13.7%Auglaize County: -1.2%Hancock County: +0.1%Morgan County: -1.6%Van Wert County: -0.1%Hardin County: -1.0%Paulding County: -0.3%Portage County: +1.2%Delaware County: +10.6%Harrison County: -3.1%Ross County: -1.3%Crawford County: -0.9%Clinton County: -0.0%Henry County: -0.5%Pike County: -0.0%Cuyahoga County: -1.7%Highland County: +1.0%Knox County: +1.7%Ottawa County: -1.5%Huron County: -0.6%Erie County: -2.2%Holmes County: +1.0%Lawrence County: -4.0%Marion County: -0.6%Fairfield County: +5.2%Putnam County: -0.6%Guernsey County: -0.5%Vinton County: -2.1%Gallia County: -1.2%Trumbull County: -0.7%Wayne County: -0.2%Perry County: +0.6%Ashland County: -0.1%Fulton County: -1.4%Brown County: +1.4%Lucas County: -1.1%Stark County: -0.1%Medina County: +1.1%Belmont County: -2.4%Williams County: -1.4%Mahoning County: -1.0%Noble County: +1.1%Greene County: +2.5%Preble County: -0.5%Allen County: -1.2%Athens County: +1.3%Jefferson County: -2.0%Adams County: +0.8%Monroe County: -2.3%Washington County: -2.2%Logan County: -0.1%Franklin County: +2.4%Warren County: +5.3%Wyandot County: -2.1%Licking County: +3.4%Hamilton County: +0.8%Clermont County: +2.6%Butler County: +2.2%Coshocton County: +1.1%Geauga County: -0.0%Sandusky County: -0.0%Ashtabula County: -0.6%Carroll County: -0.9%Tuscarawas County: -1.2%Morrow County: +2.7%Montgomery County: +0.1%Mercer County: +0.3%Lake County: -0.1%Pickaway County: +6.0%Madison County: +3.8%Muskingum County: +0.1%Meigs County: -3.0%Columbiana County: -1.8%Lorain County: +2.7%Scioto County: -2.8%Champaign County: +0.4%Summit County: -0.3%
Change 2020 to 2024
  1. < -1.4%
  2. < -0.6%
  3. < -0.0%
  4. < +1.1%
  5. ≥ +1.1%
no data

Orange pin: Knox County internal point. Dark pin: Columbus.

Internal point

Decimal
40.403600, -82.422400
DMS
40°24'12.96"N 82°25'20.64"W
UTM
17N 379300.2E 4473525.6N
Geohash
dpjmu7mb4
Plus code
86GVCH3H+C2

Towns in Knox County

6 incorporated places of 1,000+ people have residents in Knox County, 25,051 people together, or 39% of the county. Each figure counts only the part of the town inside Knox County; towns marked "part" extend into another county. The largest is Mount Vernon with 17,329.

  1. 01Mount Vernon17,329
  2. 02Fredericktown2,658
  3. 03Gambier2,338
  4. 04Centerburg1,701
  5. 05Danville1,006
  6. 06Utica (part)19
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Knox County

The Census 2024 county adjacency file lists 7 neighbors for Knox County. The most populous is Delaware County, OH, with 237,966 residents. Distances run between Census internal points in a straight line.

Distance to Columbus and the nearest big city

Columbus is 43.2 miles SW of Knox County's internal point in a straight line. The nearest place of 100,000 or more is Columbus, OH (population 933,263), 41.5 miles away. The nearest place of 10,000 or more is Mount Vernon, OH (population 17,329), 3.0 miles away.

Knox County FIPS code

The FIPS code of Knox County is 39083: state code 39 for Ohio plus county code 083. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $66,844.

Questions people ask

What is the population of Knox County, Ohio?

The Census Vintage 2024 estimate for July 1, 2024 is 63,848. That is up 1,056 people (1.7%) from the July 2020 estimate of 62,792.

What is the FIPS code of Knox County?

39083. The first two digits (39) are Ohio; the last three (083) identify the county.

What is the largest town in Knox County?

Mount Vernon, with 17,329 residents inside Knox County in 2024.

Which counties border Knox County?

7 county-equivalents border it in the Census 2024 adjacency file: Delaware County, OH; Licking County, OH; Richland County, OH; Ashland County, OH; Holmes County, OH; Coshocton County, OH; Morrow County, OH.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.