Butler County, Pennsylvania Cities (2024)

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

42 cities

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
Butler township116,78317,230-0.2%77621.6Township
Adams township215,87914,8541.77%71122.3Township
Butler312,97013,484-0.98%4,7702.7City
Butler township410,0359,5040.96%29833.6Township
Slippery Rock township58,4096,712-0.2%32625.8Township
Buffalo township68,2377,9251.05%34124.1Township
Center township77,8177,8920.09%32124.4Township
Middlesex township87,4206,8890.61%32123.1Township
Butler township95,0444,9050.92%19426.0Township
Summit township104,3764,500-0.46%19522.4Township
Connoquenessing township114,1764,2580.26%18422.7Township
Zelienople123,7533,905-1%1,8282.1Borough
Slippery Rock133,7163,1683.83%2,2591.6Borough
Forward township143,3643,2060.72%14623.0Township
Harmony township153,1083,188-0.35%1,0682.9Township
Slippery Rock township162,8732,912-0.21%9729.7Township
Oakland township172,7042,774-0.55%11423.7Township
Butler township182,6182,5510.81%10924.0Township
Clay township192,4772,543-0.4%9925.1Township
Muddy Creek township202,1572,206-0.6%9522.6Township
Evans City211,6721,740-1.01%2,0440.8Borough
Mars221,4121,462-0.91%3,0040.5Borough
Saxonburg231,3721,428-1.01%1,5140.9Borough
Worth township241,3601,397-0.44%5425.0Township
Brady township251,1981,2150.17%7117.0Township
Prospect261,0811,120-0.92%2654.1Borough
Cherry township271,0451,0530.1%4125.6Township
Harmony28918950-0.86%2,3300.4Borough
Chicora29884918-1.01%1,6590.5Borough
Harrisville30793820-0.88%9860.8Borough
Connoquenessing317826733.58%5771.4Borough
Valencia327405397.25%2,1760.3Borough
East Butler33736764-0.94%7061.0Borough
Bruin34403422-1.23%2211.8Borough
Callery35345359-1.15%6420.5Borough
West Liberty36319333-1.24%833.8Borough
Eau Claire37296308-1%2321.3Borough
Portersville38221231-1.34%2780.8Borough
Barkeyville39183190-1.08%553.3Borough
West Sunbury40175182-1.13%1,5910.1Borough
Petrolia41171178-1.16%4330.4Borough
Karns City42165172-1.2%4550.4Borough

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Butler County, Pennsylvania?

Butler township is the largest city in Butler County.

What is the smallest city in Butler County, Pennsylvania?

Karns City is the smallest city in Butler County.

How many cities are in Butler County?

There are 42 cities in Butler County, Pennsylvania.

Frequently Asked Questions