ZIP codes starting with 203
- ZIP codes
- 28
- States
- DC
- Largest city
- Naval Anacost Annex, DC
- Population
- 667
The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.
Every ZIP code in 203xx
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
20301 | Washington , DC | No street area | — | — | — |
20303 | Washington , DC | No street area | — | — | — |
20306 | Washington , DC | No street area | — | — | — |
20310 | Washington , DC | No street area | — | — | — |
20314 | Washington , DC | No street area | — | — | — |
20317 | Washington , DC | Standard | 15 | — | — |
20318 | Washington , DC | No street area | — | — | — |
20319 | Washington , DC | Standard | 23 | — | — |
20330 | Washington , DC | No street area | — | — | — |
20340 | Washington , DC | No street area | — | — | — |
20350 | Washington , DC | No street area | — | — | — |
20355 | Washington , DC | No street area | — | — | — |
20370 | Washington , DC | No street area | — | — | — |
20372 | Washington , DC | No street area | — | — | — |
20373 | Naval Anacost Annex , DC | Standard | 383 | — | — |
20374 | Washington Navy Yard , DC | No street area | — | — | — |
20375 | Washington , DC | No street area | — | — | — |
20376 | Washington Navy Yard , DC | No street area | — | — | — |
20380 | Washington , DC | No street area | — | — | — |
20388 | Washington Navy Yard , DC | Standard | 0 | — | — |
20389 | Washington , DC | No street area | — | — | — |
20390 | Washington , DC | Standard | 246 | — | — |
20391 | Washington Navy Yard , DC | No street area | — | — | — |
20392 | Washington , DC | No street area | — | — | — |
20393 | Washington , DC | No street area | — | — | — |
20394 | Washington , DC | No street area | — | — | — |
20395 | Washington , DC | No street area | — | — | — |
20398 | Washington Navy Yard , DC | No street area | — | — | — |
Cite this page
zipcodes.pro. “ZIP codes starting with 203.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/203
Underlying data is public domain or openly licensed — sources, vintages and licences.