Pennsylvania Cities that begin with O

41 cities

City
County
2025 Pop. ↓
Oil CityVenango County9,230
O'Hara townshipAllegheny County8,781
Old ForgeLackawanna County8,696
Ohio townshipAllegheny County7,407
OakmontAllegheny County6,532
Oxford townshipChester County6,112
OxfordChester County5,922
OlyphantLackawanna County5,384
Old Lycoming townshipLycoming County4,892
Oley townshipBerks County3,861
OhiovilleBeaver County3,270
Ontelaunee townshipBerks County3,115
OrwigsburgSchuylkill County3,006
Oakland townshipButler County2,689
Oliver townshipFayette County2,052
Oliver townshipFayette County2,033
Oil Creek townshipCrawford County1,640
Otto townshipMcKean County1,454
Overfield townshipWyoming County1,422
OakdaleAllegheny County1,394
Oakland townshipVenango County1,315
Orwell townshipBradford County1,193
Orange townshipColumbia County1,180
Osceola MillsClearfield County995
Oneida townshipSchuylkill County990
Oliver townshipFayette County982
Oregon townshipWayne County845
OklahomaArmstrong County763
Oil Creek townshipVenango County721
Osceola townshipTioga County570
OaklandSusquehanna County550
Otter Creek townshipMercer County502
Oakland townshipSusquehanna County489
OrangevilleColumbia County477
Ogle townshipSomerset County474
OrbisoniaHuntingdon County443
Overton townshipBradford County241
Oswayo townshipPotter County218
OrrstownFranklin County212
OswayoPotter County128
OhiopyleFayette County35