| Zip Code | City | Population ↓ |
|---|---|---|
| 15237 | Pittsburgh | 44,149 |
| 15108 | Coraopolis | 42,914 |
| 15235 | Pittsburgh | 34,383 |
| 15236 | Pittsburgh | 31,419 |
| 15102 | Bethel Park | 30,885 |
| 15221 | Pittsburgh | 29,583 |
| 15213 | Pittsburgh | 29,410 |
| 15227 | Pittsburgh | 29,383 |
| 15206 | Pittsburgh | 29,316 |
| 15146 | Monroeville | 28,551 |
| 15044 | Gibsonia | 28,246 |
| 15212 | Pittsburgh | 27,256 |
| 15217 | Pittsburgh | 26,788 |
| 15101 | Allison Park | 26,238 |
| 15210 | Pittsburgh | 26,224 |
| 15090 | Wexford | 24,964 |
| 15205 | Pittsburgh | 23,946 |
| 15136 | McKees Rocks | 23,055 |
| 15216 | Pittsburgh | 22,134 |
| 15143 | Sewickley | 22,124 |
| 15241 | Pittsburgh | 21,823 |
| 15239 | Pittsburgh | 21,329 |
| 15202 | Pittsburgh | 19,790 |
| 15106 | Carnegie | 19,550 |
| 15132 | Mckeesport | 19,387 |
| 15122 | West Mifflin | 19,220 |
| 15220 | Pittsburgh | 18,535 |
| 15228 | Pittsburgh | 18,401 |
| 15120 | Homestead | 18,136 |
| 15017 | Bridgeville | 17,408 |
| 15025 | Clairton | 16,806 |
| 15147 | Verona | 16,694 |
| 15229 | Pittsburgh | 15,408 |
| 15214 | Pittsburgh | 14,719 |
| 15234 | Pittsburgh | 14,249 |
| 15116 | Glenshaw | 14,167 |
| 15218 | Pittsburgh | 13,697 |
| 15226 | Pittsburgh | 13,673 |
| 15243 | Pittsburgh | 13,329 |
| 15201 | Pittsburgh | 13,017 |
| 15238 | Pittsburgh | 12,805 |
| 15215 | Pittsburgh | 12,647 |
| 15209 | Pittsburgh | 11,996 |
| 15232 | Pittsburgh | 11,942 |
| 15071 | Oakdale | 11,778 |
| 15065 | Natrona Heights | 11,099 |
| 15224 | Pittsburgh | 10,873 |
| 15219 | Pittsburgh | 10,680 |
| 15211 | Pittsburgh | 10,567 |
| 15207 | Pittsburgh | 10,407 |
| 15037 | Elizabeth | 10,380 |
| 15203 | Pittsburgh | 10,302 |
| 15137 | North Versailles | 10,193 |
| 15129 | South Park | 10,103 |
| 15084 | Tarentum | 9,767 |
| 15024 | Cheswick | 9,107 |
| 15208 | Pittsburgh | 9,037 |
| 15131 | Mckeesport | 8,404 |
| 15204 | Pittsburgh | 8,276 |
| 15104 | Braddock | 7,955 |
| 15126 | Imperial | 6,901 |
| 15139 | Oakmont | 6,734 |
| 15223 | Pittsburgh | 6,708 |
| 15145 | Turtle Creek | 6,528 |
| 15133 | Mckeesport | 6,033 |
| 15282 | Pittsburgh | 5,814 |
| 15222 | Pittsburgh | 5,418 |
| 15110 | Duquesne | 5,241 |
| 15135 | Mckeesport | 5,003 |
| 15045 | Glassport | 4,439 |
| 15144 | Springdale | 3,954 |
| 15112 | East Pittsburgh | 3,185 |
| 15014 | Brackenridge | 3,130 |
| 15140 | Pitcairn | 3,084 |
| 15233 | Pittsburgh | 2,783 |
| 15046 | Crescent | 2,455 |
| 15148 | Wilmerding | 2,414 |
| 15035 | East McKeesport | 2,074 |
| 15142 | Presto | 1,635 |
| 15034 | Dravosburg | 1,614 |
| 15015 | Bradfordwoods | 1,372 |
| 15056 | Leetsdale | 1,057 |
| 15030 | Creighton | 1,053 |
| 15225 | Pittsburgh | 946 |
| 15076 | Russellton | 916 |
| 15018 | Buena Vista | 893 |
| 15049 | Harwick | 885 |
| 15086 | Warrendale | 656 |
| 15020 | Bunola | 567 |
| 15007 | Bakerstown | 482 |
| 15088 | West Elizabeth | 456 |
| 15051 | Indianola | 437 |
| 15031 | Cuddy | 428 |
| 15006 | Bairdford | 273 |
| 15082 | Sturgeon | 247 |
| 15064 | Morgan | 238 |
| 15047 | Greenock | 182 |
| 15028 | Coulters | 174 |
| 15075 | Rural Ridge | 30 |
| 15123 | West Mifflin | 3 |
| 15275 | Pittsburgh | 3 |
| 15260 | Pittsburgh | 0 |
| 15290 | Pittsburgh | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 103 ZCTAs in Allegheny County, Pennsylvania (US Census).