Counties in Ohio
Each county page says how cases move there under Ohio's rules, and lists the police agencies that serve it.
88 counties, largest first
- Franklin County1,361,536 people · 37 agencies
- Cuyahoga County1,232,925 people · 66 agencies
- Hamilton County838,418 people · 46 agencies
- Montgomery County539,598 people · 28 agencies
- Summit County538,376 people · 29 agencies
- Lucas County423,347 people · 18 agencies
- Butler County400,128 people · 18 agencies
- Stark County373,771 people · 26 agencies
- Lorain County323,219 people · 17 agencies
- Warren County257,181 people · 16 agencies
- Delaware County242,032 people · 12 agencies
- Lake County232,217 people · 20 agencies
- Mahoning County224,706 people · 27 agencies
- Clermont County216,977 people · 16 agencies
- Trumbull County198,972 people · 25 agencies
- Licking County185,564 people · 18 agencies
- Medina County185,025 people · 18 agencies
- Greene County174,322 people · 14 agencies
- Fairfield County169,752 people · 12 agencies
- Portage County163,404 people · 15 agencies
- Clark County135,340 people · 11 agencies
- Wood County134,176 people · 21 agencies
- Richland County124,893 people · 10 agencies
- Wayne County116,758 people · 15 agencies
- Miami County112,634 people · 10 agencies
- Allen County100,881 people · 14 agencies
- Columbiana County99,377 people · 18 agencies
- Ashtabula County96,713 people · 11 agencies
- Geauga County95,676 people · 12 agencies
- Tuscarawas County92,373 people · 16 agencies
- Muskingum County87,014 people · 8 agencies
- Ross County76,429 people · 4 agencies
- Hancock County75,034 people · 5 agencies
- Union County73,446 people · 5 agencies
- Erie County73,296 people · 12 agencies
- Scioto County71,365 people · 5 agencies
- Marion County65,115 people · 5 agencies
- Belmont County64,434 people · 14 agencies
- Knox County64,002 people · 5 agencies
- Jefferson County63,597 people · 19 agencies
- Athens County63,197 people · 11 agencies
- Pickaway County62,978 people · 6 agencies
- Sandusky County58,655 people · 8 agencies
- Washington County58,389 people · 7 agencies
- Huron County58,250 people · 10 agencies
- Lawrence County55,710 people · 7 agencies
- Seneca County54,522 people · 9 agencies
- Ashland County52,523 people · 5 agencies
- Darke County51,520 people · 7 agencies
- Shelby County48,065 people · 7 agencies
- Madison County46,985 people · 6 agencies
- Logan County46,302 people · 6 agencies
- Auglaize County45,909 people · 10 agencies
- Holmes County44,970 people · 5 agencies
- Brown County44,397 people · 10 agencies
- Highland County43,823 people · 7 agencies
- Mercer County42,737 people · 6 agencies
- Clinton County42,301 people · 6 agencies
- Crawford County41,896 people · 5 agencies
- Fulton County41,853 people · 7 agencies
- Preble County40,664 people · 9 agencies
- Ottawa County39,481 people · 13 agencies
- Champaign County38,820 people · 5 agencies
- Guernsey County38,379 people · 4 agencies
- Defiance County38,292 people · 3 agencies
- Coshocton County37,188 people · 4 agencies
- Williams County36,549 people · 7 agencies
- Morrow County36,305 people · 5 agencies
- Perry County35,918 people · 10 agencies
- Putnam County34,380 people · 10 agencies
- Jackson County32,817 people · 5 agencies
- Hardin County30,072 people · 5 agencies
- Gallia County29,072 people · 6 agencies
- Van Wert County29,013 people · 4 agencies
- Fayette County28,552 people · 3 agencies
- Adams County27,865 people · 6 agencies
- Henry County27,598 people · 6 agencies
- Hocking County27,512 people · 4 agencies
- Pike County27,061 people · 4 agencies
- Carroll County26,475 people · 5 agencies
- Meigs County21,587 people · 6 agencies
- Wyandot County21,567 people · 4 agencies
- Paulding County18,727 people · 5 agencies
- Noble County14,276 people · 2 agencies
- Harrison County14,070 people · 6 agencies
- Morgan County13,626 people · 3 agencies
- Monroe County12,994 people · 3 agencies
- Vinton County12,645 people · 3 agencies
Population: Census Bureau county population estimates, Vintage 2025 (cc-est2025-alldata), July 1, 2025.