| Zip Code | City | Population ↓ |
|---|---|---|
| 19020 | Bensalem | 56,746 |
| 19067 | Morrisville | 53,320 |
| 18974 | Warminster | 42,811 |
| 18951 | Quakertown | 37,140 |
| 18966 | Southampton | 36,167 |
| 19047 | Langhorne | 33,874 |
| 18940 | Newtown | 29,834 |
| 18901 | Doylestown | 28,311 |
| 19053 | Feasterville Trevose | 28,245 |
| 18944 | Perkasie | 27,635 |
| 18902 | Doylestown | 22,621 |
| 18976 | Warrington | 22,352 |
| 19007 | Bristol | 22,337 |
| 18914 | Chalfont | 21,067 |
| 19057 | Levittown | 18,439 |
| 19054 | Levittown | 17,440 |
| 19056 | Levittown | 15,765 |
| 19055 | Levittown | 13,667 |
| 18938 | New Hope | 13,380 |
| 19030 | Fairless Hills | 12,490 |
| 18960 | Sellersville | 11,850 |
| 18954 | Richboro | 10,635 |
| 19021 | Croydon | 9,744 |
| 18929 | Jamison | 9,700 |
| 18925 | Furlong | 6,510 |
| 18947 | Pipersville | 6,423 |
| 18977 | Washington Crossing | 4,565 |
| 18972 | Upper Black Eddy | 3,114 |
| 18942 | Ottsville | 2,607 |
| 18077 | Riegelsville | 2,303 |
| 18917 | Dublin | 2,252 |
| 18930 | Kintnersville | 2,126 |
| 18955 | Richlandtown | 1,406 |
| 18923 | Fountainville | 1,384 |
| 18970 | Trumbauersville | 645 |
| 18946 | Pineville | 568 |
| 18920 | Erwinna | 464 |
| 18962 | Silverdale | 369 |
| 18935 | Milford Square | 316 |
| 18932 | Line Lexington | 314 |
| 18927 | Hilltown | 281 |
| 18912 | Buckingham | 181 |
| 18913 | Carversville | 180 |
| 18921 | Ferndale | 132 |
| 18933 | Lumberville | 126 |
| 18081 | Springtown | 120 |
| 18950 | Point Pleasant | 117 |
| 18980 | Wycombe | 104 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 48 ZCTAs in Bucks County, Pennsylvania (US Census).