| Zip code | Name | Area Code(s) |
| 16001 Butler (724/878) |
| 16001 Meridian (724/878) |
| 16002 Butler (724/878) |
| 16003 Butler (724/878) |
| 16016 Boyers (724/878) |
| 16016 Social Security Admin (724/878) |
| 16017 Boyers (724/878) |
| 16017 Office of Personnel Mgmt (724/878) |
| 16018 Annandale (724/878) |
| 16018 Boyers (724/878) |
| 16018 National Agency for Check Inqu (724/878) |
| 16020 Annandale (724/878) |
| 16020 Boyers (724/878) |
| 16021 Branchton (724/878) |
| 16022 Bruin (724/878) |
| 16023 Cabot (724/878) |
| 16023 Marwood (724/878) |
| 16024 Callery (724/878) |
| 16025 Chicora (724/878) |
| 16027 Connoquenessing (724/878) |
| 16027 Connoqunsg (724/878) |
| 16028 East Brady (724/878) |
| 16029 East Butler (724/878) |
| 16030 Eau Claire (724/878) |
| 16033 Evans City (724/878) |
| 16034 Fenelton (724/878) |
| 16035 Forestville (724/878) |
| 16036 Foxburg (724/878) |
| 16037 Harmony (724/878) |
| 16038 Barkeyville (724/878) |
| 16038 Harrisville (724/878) |
| 16039 Herman (724/878) |
| 16040 Hilliards (724/878) |
| 16041 Karns City (724/878) |
| 16045 Lyndora (724/878) |
| 16046 Mars (724/878) |
| 16046 Seven Fields (724/878) |
| 16048 North Washington (724/878) |
| 16049 Parker (724/878) |
| 16050 Petrolia (724/878) |
| 16051 Portersville (724/878) |
| 16052 Prospect (724/878) |
| 16053 Renfrew (724/878) |
| 16054 Saint Petersburg (724/878) |
| 16055 Sarver (724/878) |
| 16056 Saxonburg (724/878) |
| 16057 Slippery Rock (724/878) |
| 16058 Turkey City (814) |
| 16059 Valencia (724/878) |
| 16061 West Sunbury (724/878) |
| 16063 Zelienople (724/878) |
| 16066 Cranberry Township (724/878) |
| 16101 Castle (724/878) |
| 16101 New Castle (724/878) |
| 16102 Castle (724/878) |
| 16102 New Castle (724/878) |
| 16103 New Castle (724/878) |
| 16105 Castle (724/878) |
| 16105 Neshannock (724/878) |
| 16105 New Castle (724/878) |
| 16107 New Castle (724/878) |
| 16108 New Castle (724/878) |
| 16110 Adamsville (724/878) |
| 16111 Atlantic (814) |
| 16112 Bessemer (724/878) |
| 16113 Clark (724/878) |
| 16114 Clarks Mills (724/878) |
| 16115 Darlington (724/878) |
| 16116 Edinburg (724/878) |
| 16117 Ellport (724/878) |
| 16117 Ellwood City (724/878) |
| 16120 Enon Valley (724/878) |
| 16121 Farrell (724/878) |
| 16123 Fombell (724/878) |
| 16124 Fredonia (724/878) |
| 16125 Greenville (724/878) |
| 16125 Shenango (724/878) |
| 16127 Grove City (724/878) |
| 16127 Grove City Postal Retail Str (724/878) |
| 16130 Hadley (724/878) |
| 16131 Hartstown (814) |
| 16132 Hillsville (724/878) |
| 16133 Jackson Center (724/878) |
| 16134 Jamestown (724/878) |
| 16134 Westford (724/878) |
| 16136 Koppel (724/878) |
| 16137 Mercer (724/878) |
| 16140 New Bedford (724/878) |
| 16141 New Galilee (724/878) |
| 16142 New Wilmington (724/878) |
| 16142 New Wilmngtn (724/878) |
| 16143 Pulaski (724/878) |
| 16145 Sandy Lake (724/878) |
| 16146 Sharon (724/878) |
| 16148 Hermitage (724/878) |
| 16148 Sharon (724/878) |
| 16150 Sharpsville (724/878) |
| 16151 Sheakleyville (724/878) |
| 16153 Stoneboro (724/878) |
| 16154 Delaware Township (724/878) |
| 16154 South Pymatuning Township (724/878) |
| 16154 Transfer (724/878) |
| 16155 Villa Maria (724/878) |
| 16156 Volant (724/878) |
| 16157 Wampum (724/878) |
| 16159 West Middlesex (724/878) |
| 16160 West Pittsburg (724/878) |
| 16161 Wheatland (724/878) |
| 16172 New Wilmington (724/878) |
| 16172 New Wilmngtn (724/878) |
| 16172 Westminster College (724/878) |
| 16201 Kittanning (724/878) |
| 16210 Adrian (724/878) |
| 16211 Beyer (724/878) |
| 16212 Cadogan (724/878) |
| 16213 Callensburg (814) |
| 16214 Clarion (814) |
| 16217 Cooksburg (814) |
| 16218 Cowansville (724/878) |
| 16220 Crown (814) |
| 16221 Curllsville (814) |
| 16222 Dayton (814) |
| 16223 Distant (814) |
| 16224 Fairmount City (814) |
| 16225 Fisher (814) |
| 16226 Ford City (724/878) |
| 16228 Ford Cliff (724/878) |
| 16229 Freeport (724/878) |
| 16230 Hawthorn (814) |
| 16232 Knox (814) |
| 16233 Leeper (814) |
| 16234 Limestone (814) |
| 16235 Lucinda (814) |
| 16236 Mc Grann (724/878) |
| 16236 McGrann (724/878) |
| 16238 Manorville (724/878) |
| 16239 Marienville (814) |
| 16240 Mayport (814) |
| 16242 Climax (814) |
| 16242 New Bethlehem (814) |
| 16244 Nu Mine (724/878) |
| 16245 Oak Ridge (814) |
| 16246 Plumville (724/878) |
| 16248 Huey (814) |
| 16248 Rimersburg (814) |
| 16249 Rural Valley (724/878) |
| 16250 Sagamore (724/878) |
| 16253 Seminole (814) |
| 16254 Shippenville (814) |
| 16255 Sligo (814) |
| 16256 Smicksburg (814) |
| 16257 Snydersburg (814) |
| 16258 Strattanville (814) |
| 16259 Templeton (724/878) |
| 16260 Vowinckel (814) |
| 16261 Widnoon (724/878) |
| 16262 Craigsville (724/878) |
| 16262 Worthington (724/878) |
| 16263 Yatesboro (724/878) |
| 16301 Oil City (814) |
| 16301 Oil Creek (814) |
| 16311 Carlton (814) |
| 16312 Chandlers Valley (814) |
| 16312 Chandlrs Valley (814) |
| 16313 Clarendon (814) |
| 16314 Cochranton (814) |
| 16316 Conneaut Lake (814) |
| 16316 Conneaut Lake Park (814) |
| 16316 Geneva (814) |
| 16317 Cooperstown (814) |
| 16319 Cranberry (814) |
| 16321 East Hickory (814) |
| 16321 Endeavor (814) |
| 16322 Endeavor (814) |
| 16323 Franklin (814) |
| 16323 Rocky Grove (814) |
| 16326 Fryburg (814) |
| 16327 Guys Mills (814) |
| 16328 Hydetown (814) |
| 16329 Irvine (814) |
| 16331 Kossuth (814) |
| 16332 Lickingville (814) |
| 16333 Ludlow (814) |
| 16334 Marble (814) |
| 16335 Blooming Valley (814) |
| 16335 Kerrtown (814) |
| 16335 Meadville (814) |
| 16340 Pittsfield (814) |
| 16341 Pleasantville (814) |
| 16342 Polk (814) |
| 16343 Reno (814) |
| 16344 Rouseville (814) |
| 16345 Russell (814) |
| 16345 Scandia (814) |
| 16346 Seneca (814) |
| 16347 Sheffield (814) |
| 16350 Sugar Grove (814) |
| 16350 Sugargrove (814) |
| 16351 Tidioute (814) |
| 16352 Tiona (814) |
| 16353 Starr (814) |
| 16353 Tionesta (814) |
| 16354 Titusville (814) |
| 16360 Townville (814) |
| 16361 Tylersburg (814) |
| 16362 Utica (814) |
| 16364 Venus (814) |
| 16365 North Warren (814) |
| 16365 Warren (814) |
| 16366 Blair Corp (814) |
| 16366 Warren (814) |
| 16367 New Process Co (814) |
| 16367 Warren (814) |
| 16368 Crossing Pointe (814) |
| 16368 Warren (814) |
| 16369 Crossing Pointe (814) |
| 16369 Warren (814) |
| 16370 West Hickory (814) |
| 16371 Youngsville (814) |
| 16372 Clintonville (814) |
| 16373 Emlenton (724/878) |
| 16374 Kennerdell (814) |
| 16375 Lamartine (814) |
| 16388 Meadville (814) |
| 16388 Warren Industries (814) |
| 16401 Albion (814) |
| 16401 Cherry Hill (814) |
| 16401 Conneaut Township (814) |
| 16401 Elk Creek Township (814) |
| 16401 Lundys Lane (814) |
| 16401 Pageville (814) |
| 16401 Pont (814) |
| 16402 Bear Lake (814) |
| 16403 Cambridg Springs (814) |
| 16403 Cambridge Springs (814) |
| 16404 Centerville (814) |
| 16405 Columbus (814) |
| 16406 Conneautville (814) |
| 16407 Columbus Boro (814) |
| 16407 Corry (814) |
| 16410 Cranesville (814) |
| 16411 East Springfield (814) |
| 16412 Crossingville (814) |
| 16412 Edinboro (814) |
| 16413 Elgin (814) |
| 16415 Fairview (814) |
| 16416 Garland (814) |
| 16417 Girard (814) |
| 16420 Grand Valley (814) |
| 16421 Harborcreek (814) |
| 16422 Harmonsburg (814) |
| 16423 Lake City (814) |
| 16424 Espyville (814) |
| 16424 Linesville (814) |
| 16426 Mc Kean (814) |
| 16426 McKean (814) |
| 16426 McLane (814) |
| 16427 Mill Village (814) |
| 16428 North East (814) |
| 16430 North Springfield (814) |
| 16432 Riceville (814) |
| 16433 Saegertown (814) |
| 16434 Spartansburg (814) |
| 16435 Springboro (814) |
| 16436 Spring Creek (814) |
| 16438 Canadohta Lake (814) |
| 16438 Union City (814) |
| 16440 Venango (814) |
| 16441 Waterford (814) |
| 16442 Lowville (814) |
| 16442 Phillipsville (814) |
| 16442 Wattsburg (814) |
| 16443 West Springfield (814) |
| 16444 Edinboro (814) |
| 16444 Edinboro University (814) |
| 16475 Albion (814) |
| 16475 Albion Correctional Inst (814) |