| Locality | Postal Code |
|---|---|
| Buk-myeon, Gapyeong (북면) | 12400, 12401, 12402, 12403, 12404, … |
| Cheongpyeong-myeon, Gapyeong (청평면) | 12449, 12450, 12451, 12452, 12453, … |
| Gapyeong-eup, Gapyeong (가평읍) | 12408, 12409, 12410, 12411, 12412, … |
| Jojong-myeon, Gapyeong (조종면) | 12431, 12432, 12433, 12434, 12435, … |
| Sang-myeon, Gapyeong (상면) | 12438, 12439, 12440, 12441, 12442, … |
| Seorak-myeon, Gapyeong (설악면) | 12459, 12460, 12461, 12462, 12463, … |