| Zip Code | City | Population ↓ |
|---|---|---|
| 19082 | Upper Darby | 42,847 |
| 19063 | Media | 37,716 |
| 19083 | Havertown | 37,143 |
| 19013 | Chester | 34,456 |
| 19026 | Drexel Hill | 31,917 |
| 19050 | Lansdowne | 28,905 |
| 19064 | Springfield | 25,218 |
| 19018 | Clifton Heights | 23,302 |
| 19023 | Darby | 22,493 |
| 19010 | Bryn Mawr | 21,406 |
| 19073 | Newtown Square | 21,297 |
| 19342 | Glen Mills | 20,948 |
| 19014 | Aston | 20,925 |
| 19008 | Broomall | 20,492 |
| 19061 | Marcus Hook | 20,282 |
| 19015 | Brookhaven | 16,484 |
| 19003 | Ardmore | 13,953 |
| 19036 | Glenolden | 13,181 |
| 19086 | Wallingford | 12,649 |
| 19078 | Ridley Park | 11,671 |
| 19060 | Garnet Valley | 11,239 |
| 19085 | Villanova | 10,779 |
| 19081 | Swarthmore | 10,577 |
| 19079 | Sharon Hill | 9,183 |
| 19033 | Folsom | 7,804 |
| 19032 | Folcroft | 6,758 |
| 19076 | Prospect Park | 6,449 |
| 19070 | Morton | 6,409 |
| 19041 | Haverford | 6,404 |
| 19074 | Norwood | 5,926 |
| 19094 | Woodlyn | 4,589 |
| 19029 | Essington | 3,988 |
| 19022 | Crum Lynne | 3,671 |
| 19043 | Holmes | 3,051 |
| 19373 | Thornton | 1,919 |
| 19319 | Cheyney | 735 |
| 19052 | Lenni | 625 |
| 19017 | Chester Heights | 289 |
| 19113 | Philadelphia | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 39 ZCTAs in Delaware County, Pennsylvania (US Census).