| Locality | Post Code |
|---|---|
| Abbottstown, Adams | 17301 |
| Arendtsville, Adams | 17303 |
| Aspers, Adams | 17304 |
| Beecherstown, Adams | 17307 |
| Bendersville, Adams | 17306 |
| Biglerville, Adams | 17307 |
| Bonneauville, Adams | 17325 |
| Brysonia, Adams | 17307 |
| Carroll Valley, Adams | 17320 |
| Cashtown, Adams | 17310 |
| Center Mills, Adams | 17304 |
| Charnita, Adams | 17320 |
| East Berlin, Adams | 17316 |
| Fairfield, Adams | 17320 |
| Fairplay, Adams | 17325 |
| Fayetteville, Adams | 17222 |
| Floradale, Adams | 17307 |
| Gardners, Adams | 17324 |
| Gettysburg, Adams | 17325 |
| Goodyear, Adams | 17324 |
| Greenstone, Adams | 17320 |
| Guernsey, Adams | 17307 |
| Heidlersburg, Adams | 17325 |
| Hunters Run, Adams | 17324 |
| Hunterstown, Adams | 17325 |
| Idaville, Adams | 17337 |