Counties in Pennsylvania
Each county page says how cases move there under Pennsylvania's rules, and lists the police agencies that serve it.
67 counties, largest first
- Philadelphia County1,574,281 people · 10 agencies
- Allegheny County1,225,035 people · 147 agencies
- Montgomery County877,643 people · 63 agencies
- Bucks County647,828 people · 62 agencies
- Delaware County580,937 people · 52 agencies
- Lancaster County563,159 people · 56 agencies
- Chester County557,116 people · 61 agencies
- York County473,197 people · 50 agencies
- Berks County440,072 people · 57 agencies
- Lehigh County384,383 people · 27 agencies
- Westmoreland County349,324 people · 59 agencies
- Luzerne County332,126 people · 65 agencies
- Northampton County324,411 people · 41 agencies
- Dauphin County293,351 people · 33 agencies
- Cumberland County277,270 people · 29 agencies
- Erie County265,832 people · 24 agencies
- Lackawanna County216,502 people · 42 agencies
- Washington County210,802 people · 56 agencies
- Butler County200,169 people · 28 agencies
- Monroe County167,179 people · 18 agencies
- Beaver County166,032 people · 52 agencies
- Franklin County160,652 people · 15 agencies
- Centre County157,393 people · 17 agencies
- Lebanon County146,380 people · 30 agencies
- Schuylkill County145,085 people · 56 agencies
- Cambria County128,968 people · 58 agencies
- Fayette County123,021 people · 34 agencies
- Blair County119,541 people · 23 agencies
- Lycoming County112,587 people · 21 agencies
- Mercer County107,860 people · 29 agencies
- Adams County107,594 people · 25 agencies
- Northumberland County89,920 people · 20 agencies
- Lawrence County83,911 people · 23 agencies
- Indiana County82,878 people · 14 agencies
- Crawford County81,792 people · 18 agencies
- Clearfield County78,100 people · 20 agencies
- Somerset County72,004 people · 28 agencies
- Columbia County66,193 people · 33 agencies
- Carbon County65,868 people · 19 agencies
- Armstrong County63,698 people · 25 agencies
- Pike County62,808 people · 11 agencies
- Bradford County59,600 people · 15 agencies
- Wayne County51,703 people · 10 agencies
- Venango County49,346 people · 10 agencies
- Bedford County47,480 people · 12 agencies
- Perry County46,806 people · 12 agencies
- Mifflin County46,127 people · 13 agencies
- Jefferson County43,255 people · 15 agencies
- Huntingdon County43,001 people · 10 agencies
- Union County42,313 people · 14 agencies
- Tioga County40,502 people · 21 agencies
- Snyder County39,655 people · 8 agencies
- McKean County38,984 people · 15 agencies
- Susquehanna County38,237 people · 17 agencies
- Clinton County37,870 people · 18 agencies
- Warren County37,038 people · 14 agencies
- Clarion County36,680 people · 15 agencies
- Greene County33,885 people · 13 agencies
- Elk County29,926 people · 10 agencies
- Wyoming County25,790 people · 16 agencies
- Juniata County23,403 people · 7 agencies
- Montour County17,868 people · 7 agencies
- Potter County15,897 people · 12 agencies
- Fulton County14,483 people · 7 agencies
- Forest County6,614 people · 4 agencies
- Sullivan County5,856 people · 7 agencies
- Cameron County4,211 people · 9 agencies
Population: Census Bureau county population estimates, Vintage 2025 (cc-est2025-alldata), July 1, 2025.