Ohio Counties by Population (2025)

by Kristen Carney Kristen Carney

Updated: December 17, 2024

The most populous counties in Ohio are Franklin County with 1,326,063, Cuyahoga County at 1,233,088, Hamilton County with 827,058, Summit County at 535,733, and Montgomery County with 533,796. You can get the most current Census population data for all 88 Ohio counties, sorted from the most populous counties in Ohio to the least, according to the 2023 Population Estimates Program.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Ohio counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!

Download the newest population data for Ohio counties

↓ Download (.xlsx)

Free, Excel™ file.
Trusted by 13,528 businesses.
Rank County Population
1 Franklin County 1,326,063
2 Cuyahoga County 1,233,088
3 Hamilton County 827,058
4 Summit County 535,733
5 Montgomery County 533,796
6 Lucas County 425,484
7 Butler County 393,043
8 Stark County 372,716
9 Lorain County 317,910
10 Warren County 252,148
11 Lake County 231,640
12 Delaware County 231,636
13 Mahoning County 225,596
14 Clermont County 211,972
15 Trumbull County 200,373
16 Medina County 184,042
17 Licking County 183,201
18 Greene County 169,691
19 Fairfield County 165,360
20 Portage County 162,665
21 Clark County 134,610
22 Wood County 132,650
23 Richland County 125,064
24 Wayne County 116,510
25 Miami County 110,876
26 Allen County 100,838
27 Columbiana County 100,182
28 Ashtabula County 96,845
29 Geauga County 95,407
30 Tuscarawas County 91,874
31 Muskingum County 86,305
32 Ross County 76,501
33 Hancock County 74,704
34 Erie County 74,035
35 Scioto County 71,969
36 Union County 69,637
37 Belmont County 64,918
38 Marion County 64,851
39 Jefferson County 64,026
40 Knox County 63,320
41 Athens County 62,706
42 Pickaway County 61,086
43 Sandusky County 58,709
44 Washington County 58,577
45 Huron County 58,199
46 Lawrence County 56,118
47 Seneca County 54,527
48 Ashland County 52,190
49 Darke County 51,415
50 Shelby County 47,765
51 Logan County 46,057
52 Auglaize County 46,050
53 Madison County 44,602
54 Holmes County 44,386
55 Brown County 43,777
56 Highland County 43,614
57 Mercer County 42,439
58 Fulton County 42,007
59 Clinton County 41,938
60 Crawford County 41,529
61 Preble County 40,556
62 Ottawa County 39,803
63 Champaign County 38,845
64 Defiance County 38,315
65 Guernsey County 38,089
66 Coshocton County 36,869
67 Williams County 36,591
68 Morrow County 35,595
69 Perry County 35,551
70 Putnam County 34,199
71 Jackson County 32,606
72 Hardin County 30,368
73 Gallia County 28,986
74 Fayette County 28,817
75 Van Wert County 28,704
76 Hocking County 27,540
77 Adams County 27,521
78 Henry County 27,520
79 Pike County 27,001
80 Carroll County 26,758
81 Meigs County 21,767
82 Wyandot County 21,457
83 Paulding County 18,706
84 Noble County 14,311
85 Harrison County 14,159
86 Morgan County 13,646
87 Monroe County 13,153
88 Vinton County 12,474

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2023. Population Division. May 2024.

Email Me When New Data Are Released

Join thousands of subscribers and receive just 2 (TWO!) emails a year in March and December when the US Census Bureau releases new population data for Ohio counties.

Products & Services

Plumbing

Connect

Cubit logo

© Copyright 2025 Cubit Planning, Inc.