| Post Office / Place | Zip | USPS category | County | 2000 Census Population | Notes |
| zipname | 76544 | | | zip |
| KILLEEN | 76544 | default | | zip/place |
| KILLEEN BASE | 76544 | | | obsolete zip/place, Branch of Killeen closed Pct 1 1974, reopened as Killeen Army Base |
| KILLEEN ARMY BASE | 76544 | | | obsolete zip/place, Branch of Killeen closed Jan 8 1977, reopened as West Fort Hood |
| WEST FORT HOOD | 76544 | | | obsolete zip/place, Branch of Killeen closed Dec 29 1978 |
| FORT HOOD | 76544 | acceptable | | zip/place, 254-287-2728, Bldg 332 761st Tank Battallion Ave, M-F 7:30-5 Sat 8:30-1 |
| CHAFFEE VILLAGE | 76544 | not acceptable | | use KILLEEN, zip/place |
| CLEAR CREEK | 76544 | not acceptable | | use KILLEEN, zip/place, Clear Creek CPU, no phone #, Bldg 50005, Fort Hood, TX, M-F 9-4:30 Sat 9-12 |
| MCNAIR VILLAGE | 76544 | not acceptable | | use KILLEEN, zip/place |
| MONTAGUE VILLAGE | 76544 | not acceptable | | use KILLEEN, zip/place |
| rural | 76544 | | | zip/place |
| | 76544 | | | | zip/county |
| rural | 76544 | | | | zip/county-place |
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