Post office boxes are in the following post offices
Post office boxes can be rented on a yearly basis in most post offices. Special post codes are used for post office boxes in few post offices.
| 101 Reykjavík |
| 108 Reykjavík |
| 109 Reykjavík |
| 110 Reykjavík |
| 112 Reykjavík |
| 170 Seltjarnarnes |
| 200 Kópavogur |
| 210 Garðabær |
| 220 Hafnarfjörður |
| 230 Keflavík |
| 240 Grindavík |
| 245 Sandgerði |
| 250 Garður |
| 270 Mosfellsbær |
| 300 Akranes |
| 310 Borgarnes |
| 320 Reykholt |
| 340 Stykkishólmur |
| 350 Grundarfjörður |
| 355 Ólafsvík |
| 360 Hellissandur |
| 370 Búðardalur |
| 400 Ísafjörður |
| 415 Bolungarvík |
| 420 Súðavík |
| 425 Flateyri |
| 430 Suðureyri |
| 450 Patreksfjörður |
| 460 Tálknafjörður |
| 465 Bíldudalur |
| 510 Hólmavík |
| 530 Hvammstangi |
| 540 Blönduós |
| 550 Sauðárkrókur |
| 560 Varmahlíð |
| 565 Hofsós |
| 580 Siglufjörður |
| 600 Akureyri |
| 620 Dalvík |
| 640 Húsavík |
| 670 Kópasker |
| 675 Raufarhöfn |
| 680 Þórshöfn |
| 685 Bakkafjörður |
| 690 Vopnafjörður |
| 700 Egilsstaðir |
| 710 Seyðisfjörður |
| 730 Reyðarfjörður |
| 735 Eskifjörður |
| 740 Neskaupstaður |
| 750 Fáskrúðsfjörður |
| 780 Höfn |
| 800 Selfoss |
| 810 Hveragerði |
| 815 Þorlákshöfn |
| 825 Stokkseyri |
| 840 Laugarvatn |
| 845 Flúðir |
| 850 Hella |
| 860 Hvolsvöllur |
| 880 Kirkjubæjarklaustur |
| 900 Vestmannaeyjar |
Special post box post codes
| 101 121 Reykjavík |
| 104 124 Reykjavík |
| 105 125 Reykjavík |
| 107 127 Reykjavík |
| 108, 103 128 Reykjavík |
| 109, 111 129 Reykjavík |
| 110, 113 130 Reykjavík |
| 112 132 Reykjavík |
| 170 172 Seltjarnarnes |
| 200 - 203 202 Kópavogur |
| 210, 225 212 Garðabær |
| 220 - 221 222 Hafnarfjörður |
| 230 232 Keflavík |
| 300 302 Akranes |
| 600 - 603 602 Akureyri |
| 800 802 Selfoss |
| 900 902 Vestmannaeyjar |