Data / Rankings / Population density / Counties in Ohio

Counties in Ohio by population density

Cuyahoga County had the highest population density of 88 counties in 2020, at 1,066.2 inhabitants per km². Monroe County had the lowest, at 11.3 inhabitants per km². The median was 46 inhabitants per km² and the figure for Ohio was 111.5 inhabitants per km². Source: the U.S. Census Bureau.

Highest1,066.2Cuyahoga County
Lowest11.3Monroe County
Median4688 counties
Ohio111.5History

Top 40 counties, 2020

CSVChart (SVG)

Cuyahoga CountyCuyahoga County: 1,066.2 inhabitants per km²1,066.2Franklin CountyFranklin County: 960.5 inhabitants per km²960.5Hamilton CountyHamilton County: 790.8 inhabitants per km²790.8Summit CountySummit County: 505.1 inhabitants per km²505.1Lucas CountyLucas County: 489.7 inhabitants per km²489.7Montgomery CountyMontgomery County: 449.5 inhabitants per km²449.5Lake CountyLake County: 391.4 inhabitants per km²391.4Butler CountyButler County: 323.5 inhabitants per km²323.5Stark CountyStark County: 251.5 inhabitants per km²251.5Lorain CountyLorain County: 246.8 inhabitants per km²246.8Warren CountyWarren County: 233.9 inhabitants per km²233.9Mahoning CountyMahoning County: 213.9 inhabitants per km²213.9Delaware CountyDelaware County: 187.5 inhabitants per km²187.5Clermont CountyClermont County: 178.1 inhabitants per km²178.1Medina CountyMedina County: 167.3 inhabitants per km²167.3Greene CountyGreene County: 157 inhabitants per km²157Clark CountyClark County: 132.5 inhabitants per km²132.5Portage CountyPortage County: 128.2 inhabitants per km²128.2Trumbull CountyTrumbull County: 126.1 inhabitants per km²126.1Fairfield CountyFairfield County: 122.1 inhabitants per km²122.1Erie CountyErie County: 116 inhabitants per km²116Miami CountyMiami County: 103.5 inhabitants per km²103.5Licking CountyLicking County: 101.2 inhabitants per km²101.2Allen CountyAllen County: 97.9 inhabitants per km²97.9Richland CountyRichland County: 97.4 inhabitants per km²97.4Geauga CountyGeauga County: 92 inhabitants per km²92Wood CountyWood County: 82.7 inhabitants per km²82.7Wayne CountyWayne County: 81.3 inhabitants per km²81.3Columbiana CountyColumbiana County: 73.8 inhabitants per km²73.8Tuscarawas CountyTuscarawas County: 63.4 inhabitants per km²63.4Marion CountyMarion County: 62.5 inhabitants per km²62.5Jefferson CountyJefferson County: 61.6 inhabitants per km²61.6Ottawa CountyOttawa County: 61.1 inhabitants per km²61.1Union CountyUnion County: 56.4 inhabitants per km²56.4Sandusky CountySandusky County: 55.7 inhabitants per km²55.7Hancock CountyHancock County: 54.5 inhabitants per km²54.5Ashtabula CountyAshtabula County: 53.6 inhabitants per km²53.6Muskingum CountyMuskingum County: 50.2 inhabitants per km²50.2Lawrence CountyLawrence County: 49.5 inhabitants per km²49.5Belmont CountyBelmont County: 48.1 inhabitants per km²48.1
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2020
inhabitants per km²
1Cuyahoga County1,066.2
2Franklin County960.5
3Hamilton County790.8
4Summit County505.1
5Lucas County489.7
6Montgomery County449.5
7Lake County391.4
8Butler County323.5
9Stark County251.5
10Lorain County246.8
11Warren County233.9
12Mahoning County213.9
13Delaware County187.5
14Clermont County178.1
15Medina County167.3
16Greene County157
17Clark County132.5
18Portage County128.2
19Trumbull County126.1
20Fairfield County122.1
21Erie County116
22Miami County103.5
23Licking County101.2
24Allen County97.9
25Richland County97.4
26Geauga County92
27Wood County82.7
28Wayne County81.3
29Columbiana County73.8
30Tuscarawas County63.4
31Marion County62.5
32Jefferson County61.6
33Ottawa County61.1
34Union County56.4
35Sandusky County55.7
36Hancock County54.5
37Ashtabula County53.6
38Muskingum County50.2
39Lawrence County49.5
40Belmont County48.1
41Ashland County47.9
42Athens County47.8
43Scioto County46.7
44Knox County46.1
45Huron County45.9
46Shelby County45.6
47Pickaway County45.2
48Auglaize County44.7
49Ross County43.2
50Fulton County40.6
51Holmes County40.4
52Crawford County40.4
53Clinton County39.7
54Logan County38.8
55Seneca County38.6
56Preble County37.3
57Washington County36.4
58Madison County36.3
59Defiance County35.9
60Mercer County35.5
61Champaign County34.9
62Brown County34.5
63Williams County34
64Perry County33.6
65Darke County33.5
66Morrow County33.3
67Highland County30.3
68Jackson County30
69Guernsey County28.4
70Fayette County27.5
71Putnam County27.5
72Van Wert County27.3
73Carroll County26.2
74Hocking County25.7
75Henry County25.7
76Hardin County25.2
77Coshocton County25.1
78Gallia County24.2
79Pike County23.7
80Wyandot County20.8
81Meigs County19.9
82Adams County18.2
83Paulding County17.4
84Harrison County13.9
85Noble County13.7
86Morgan County12.8
87Vinton County12
88Monroe County11.3

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Cuyahoga County, with 1,066.2 inhabitants per km² in 2020, according to the U.S. Census Bureau.

Which county has the lowest population density?

Monroe County, with 11.3 inhabitants per km² in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Ohio: more rankings