| Locality | Post Code |
|---|---|
| Ashton, Montgomery | 20861 |
| Aspen Hill, Montgomery | 20906 |
| Barnesville, Montgomery | 20838 |
| Beallsville, Montgomery | 20839 |
| Bethesda, Montgomery | 20814, 20816, 20817, 20889 |
| Boyds, Montgomery | 20841 |
| Brinklow, Montgomery | 20862 |
| Brookeville, Montgomery | 20833 |
| Burtonsville, Montgomery | 20866 |
| Cabin John, Montgomery | 20818 |
| Chevy Chase, Montgomery | 20815 |
| Chevy Chase Village, Montgomery | 20815 |
| Clarksburg, Montgomery | 20871 |
| Cloverly, Montgomery | 20904, 20905 |
| Colesville, Montgomery | 20904 |
| Comus, Montgomery | 20842 |
| Damascus, Montgomery | 20872 |
| Darnestown, Montgomery | 20874, 20878 |
| Derwood, Montgomery | 20855 |
| Dickerson, Montgomery | 20842 |
| Gaithersburg, Montgomery | 20877, 20878, 20879, 20882, 20886 |
| Garrett Park, Montgomery | 20896 |
| Germantown, Montgomery | 20874, 20876 |
| Glen Echo, Montgomery | 20812 |
| Glenmont, Montgomery | 20906 |
| Hillandale, Montgomery | 20903 |