ZIP codes

ZIP codes in Butler County, Pennsylvania

Butler County has 36 ZIP codes. 21 lie entirely inside it and 15 are shared with neighboring counties, so part of their land and their people are elsewhere. About 198,005 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 36; 1 more just touches the border (under 1% of their land)
Entirely inside: 21; 99% or more of their land
Shared with other counties: 15; Most with Armstrong County (5)
Most populated ZIP: 16001; 39,234 people · Shanor-Northvue
Least populated ZIP: 16024; 210 people · Callery
Largest ZIP by land: 16057; 89 sq mi · West Liberty

Map of the ZIP codes in Butler County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Butler County

36 ZIP codes in Butler County, PA, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
15044	Gibsonia	27,370	3.2%	≈ 2,048
15086	—	788	25%	≈ 348
16001	Shanor-Northvue	39,234	100%	39,234
16002	Nixon	15,587	100%	15,587
16020	—	1,169	100%	1,169
16022	Bruin	219	100%	219
16023	—	4,082	100%	4,082
16024	Callery	210	100%	210
16025	Chicora	4,793	88%	≈ 4,437
16027	Connoquenessing	423	100%	423
16029	East Butler	916	100%	916
16030	Eau Claire	272	100%	272
16033	Evans City	8,185	100%	8,185
16034	—	1,752	100%	1,752
16035	—	252	100%	252
16037	Harmony	5,291	86%	≈ 4,810
16038	Barkeyville	3,292	62%	≈ 2,686
16040	—	1,013	100%	1,013
16041	Karns City	1,747	61%	≈ 1,095
16045	Homeacre-Lyndora	1,136	100%	1,136
16046	Seven Fields	19,757	80%	≈ 15,890
16048	—	225	100%	225
16049	Cherry Valley	2,965	43%	≈ 1,268
16050	Bruin	1,097	100%	1,097
16051	Portersville	3,119	60%	≈ 1,894
16052	Prospect	2,215	100%	2,215
16053	Oak Hills	3,429	100%	3,429
16055	—	8,993	88%	≈ 8,560
16056	Saxonburg	4,232	100%	4,232
16057	West Liberty	15,718	86%	≈ 14,854
16059	Valencia	10,062	97%	≈ 9,568
16061	West Sunbury	2,564	100%	2,564
16063	Zelienople	8,256	78%	≈ 7,517
16066	—	33,873	100%	33,873
16229	Freeport	4,798	7.1%	≈ 614
16373	Cherry Valley	3,254	7.0%	≈ 287

They also touch the county with under 1% of their land, so they aren’t counted: 16127.

ZIP codes shared with other counties

These 15 ZIP codes have part of their land in another county. The first figure is the share of their land in Butler County; then, where the rest lies.

15044 (Gibsonia): 3.2% here; 97% in Allegheny County.
15086: 25% here; 75% in Allegheny County.
16025 (Chicora): 88% here; 12% in Armstrong County.
16037 (Harmony): 86% here; 7.8% in Lawrence County and 5.9% in Beaver County.
16038 (Barkeyville): 62% here; 38% in Venango County.
16041 (Karns City): 61% here; 39% in Armstrong County.
16046 (Seven Fields): 80% here; 20% in Allegheny County.
16049 (Cherry Valley): 43% here; 46% in Clarion County and 11% in Armstrong County.
16051 (Portersville): 60% here; 41% in Lawrence County.
16055: 88% here; 12% in Armstrong County.
16057 (West Liberty): 86% here; 13% in Lawrence County and 1.1% in Mercer County.
16059 (Valencia): 97% here; 3.4% in Allegheny County.
16063 (Zelienople): 78% here; 22% in Beaver County.
16229 (Freeport): 7.1% here; 88% in Armstrong County and 4.9% in Westmoreland County.
16373 (Cherry Valley): 7.0% here; 65% in Venango County and 28% in Clarion County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Bruin (2), Cherry Valley (2), Barkeyville (1), Callery (1), Chicora (1), and Connoquenessing (1); 25 places in all.

They start with 4 different three-digit prefixes, one per USPS sorting center: 150, 160, 162, and 163.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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