| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 02804 | Ashaway | Ashaway | Rhode Island | Providence-Warwick RI-MA |
| 17066 | Aughwick | Mount union | Pennsylvania | Huntingdon PA |
| 17201 | Aqua | Chambersburg | Pennsylvania | Chambersburg-Waynesboro PA |
| 20607 | Accokeek | Accokeek | Maryland | Washington-Arlington-Alexandria DC-VA-MD |
| 23003 | Akk | Ark | Virginia | Virginia Beach-Norfolk-Newport News VA-N |
| 23005 | Ashaiiu | Ashland | Virginia | Richmond VA |
| 27910 | Ahoskie | Ahoskie | North Carolina | |
| 28420 | Ash | Ash | North Carolina | Myrtle Beach-Conway-North Myrtle Beach S |
| 36505 | Axis | Axis | Alabama | Mobile AL |
| 38621 | Askew | Crenshaw | Mississippi | |
| 40801 | Ages | Ages brookside | Kentucky | |
| 41722 | Ajax | Bulan | Kentucky | |
| 57420 | Akaska | Akaska | South Dakota | |
| 65263 | Ash | Madison | Missouri | |
| 71040 | Aycock | Homer | Louisiana | |
| 71450 | Ajax | Marthaville | Louisiana | Natchitoches LA |
| 75939 | Asia | Corrigan | Texas | |
| 77326 | Ace | Ace | Texas | |
| 83350 | Acequia | Rupert | Idaho | Burley ID |
| 83520 | Ahsahka | Ahsahka | Idaho | |
| 85287 | Asu | Tempe | Arizona | Phoenix-Mesa-Scottsdale AZ |
| 85321 | Ajo | Ajo | Arizona | Tucson AZ |
| 91702 | Azusa | Azusa | California | Los Angeles-Long Beach-Anaheim CA |
| 99551 | Akiachak | Akiachak | Alaska | |
| 99552 | Akiak | Akiak | Alaska | |
| 99615 | Akhiok | Kodiak | Alaska | |