| Zip Code | City | County | Population ↓ |
|---|---|---|---|
| 20002 | Washington | District of Columbia | 72,397 |
| 20011 | Washington | District of Columbia | 67,434 |
| 20019 | Washington | District of Columbia | 63,380 |
| 20020 | Washington | District of Columbia | 53,005 |
| 20009 | Washington | District of Columbia | 50,150 |
| 20001 | Washington | District of Columbia | 44,616 |
| 20032 | Washington | District of Columbia | 40,920 |
| 20003 | Washington | District of Columbia | 37,482 |
| 20016 | Washington | District of Columbia | 32,730 |
| 20010 | Washington | District of Columbia | 31,808 |
| 20008 | Washington | District of Columbia | 29,434 |
| 20007 | Washington | District of Columbia | 24,602 |
| 20017 | Washington | District of Columbia | 21,208 |
| 20018 | Washington | District of Columbia | 19,562 |
| 20012 | Washington | District of Columbia | 17,519 |
| 20024 | Washington | District of Columbia | 15,888 |
| 20015 | Washington | District of Columbia | 15,653 |
| 20037 | Washington | District of Columbia | 13,156 |
| 20005 | Washington | District of Columbia | 13,131 |
| 20036 | Washington | District of Columbia | 4,605 |
| 20057 | Washington | District of Columbia | 3,229 |
| 20052 | Washington | District of Columbia | 2,730 |
| 20004 | Washington | District of Columbia | 1,831 |
| 20064 | Washington | District of Columbia | 1,442 |
| 20006 | Washington | District of Columbia | 1,362 |
| 20059 | Washington | District of Columbia | 1,338 |
| 20373 | Naval Anacost Annex | District of Columbia | 383 |
| 20390 | Washington | District of Columbia | 246 |
| 20319 | Washington | District of Columbia | 23 |
| 20422 | Washington | District of Columbia | 15 |
| 20317 | Washington | District of Columbia | 15 |
| 20431 | Washington | District of Columbia | 0 |
| 20591 | Washington | District of Columbia | 0 |
| 20510 | Washington | District of Columbia | 0 |
| 20515 | Washington | District of Columbia | 0 |
| 20520 | Washington | District of Columbia | 0 |
| 20530 | Washington | District of Columbia | 0 |
| 20535 | Washington | District of Columbia | 0 |
| 20540 | Washington | District of Columbia | 0 |
| 20542 | Washington | District of Columbia | 0 |
| 20551 | Washington | District of Columbia | 0 |
| 20560 | Washington | District of Columbia | 0 |
| 20565 | Washington | District of Columbia | 0 |
| 20566 | Washington | District of Columbia | 0 |
| 20427 | Washington | District of Columbia | 0 |
| 20418 | Washington | District of Columbia | 0 |
| 20415 | Washington | District of Columbia | 0 |
| 20408 | Washington | District of Columbia | 0 |
| 20388 | Washington Navy Yard | District of Columbia | 0 |
| 20260 | Washington | District of Columbia | 0 |
| 20250 | Washington | District of Columbia | 0 |
| 20245 | Washington | District of Columbia | 0 |
| 20240 | Washington | District of Columbia | 0 |
| 20230 | Washington | District of Columbia | 0 |
| 20220 | Washington | District of Columbia | 0 |
| 20204 | Washington | District of Columbia | 0 |
| 20045 | Washington | District of Columbia | 0 |
ZIP Codes and ZCTAs (ZIP Code Tabulation Areas) serve different purposes. ZIP Codes are postal codes created by the USPS for mail delivery, and are not correlated to geographical coordinates. ZCTAs provide a way to analyze census data in relation to ZIP Code areas while maintaining geographic consistency and protecting privacy. In addition, there are more ZIP Codes than ZCTAs, because many ZIP Codes for PO Boxes or unique entities don't have corresponding ZCTAs (US Census).
The data shown reflect ZCTAs from the US Census. As of 2025, there are 57 ZCTAs in District of Columbia (US Census).