| Identification | APO Number | Date Opened |
|---|---|---|
| Armagh | NY 2 | 25 Oct 1943 |
| Ballymena | NY 577 | 16 Dec 1943 |
| Bangor | NY 153 | 21 Jan 1944 |
| Belfast | NY 813 | 21 Jan 1942 |
| Bryansford | NY 5 | 8 Nov 1943 |
| Castle Dawson | NY 469 | 12 Dec 1943 |
| Castle Dawson | NY 441 | 5 Apr 1944 |
| Castlewellan | NY 251 | May 1942 |
| Cluntoe | NY 128 | 23 Apr 1944 |
| Coleraine | NY 129 | 29 Jan 1944 |
| Irvinestown | NY 147 | 23 Feb 1944 |
| Kirkassock House | NY 639 | 16 Sep 1942 |
| Langford Lodge | NY 132 | 17 Mar 1944 |
| Langford Lodge | NY 636 | 16 Oct 1942 |
| Limavady | NY 131 | Nov 1944 |
| Londonderry | NY 641 | 23 Jul 1942 |
| Lurgan | NY 305 | 22 May 42 |
| Lurgan | NY 436 | 4 Feb 1944 |
| Newcastle | NY 5 | Dec 1943 |
| Omagh | NY 34 | Mar 1943 |
| Omagh | NY 8 | 23 Dec 1943 |
| Toome | NY 146 | 4 Feb 1944 |
| Identification | UNIT APOs (2) |
|---|---|
| V Corps | |
| XV Corps | |
| 1st Armored Division | |
| 2d Infantry Division | APO 2 |
| 5th Infantry Division | |
| 8th Infantry Division | APO 8 |
| 34th Infantry Division | |
| 82d Airborne Division | APO 439 |
(1) SOURCE: Consolidated listing of Army Post Offices established during World War II prepared by Adjutant General's Office in 1947; copy on file in library, US Army Center of Military History.
(2) Divisions and larger tactical organizations maintained a single APO during World War II which moved with the units.