RIAU memiliki 214 kode pos unik
| # | Kode Pos | Jumlah Desa |
|---|---|---|
| 121 | 28613 |
1 |
| 122 | 28614 |
1 |
| 123 | 28615 |
1 |
| 124 | 28616 |
1 |
| 125 | 28617 |
1 |
| 126 | 28621 |
1 |
| 127 | 28622 |
1 |
| 128 | 28623 |
1 |
| 129 | 28624 |
1 |
| 130 | 28625 |
1 |
| 131 | 28626 |
1 |
| 132 | 28627 |
1 |
| 133 | 28628 |
1 |
| 134 | 28652 |
10 |
| 135 | 28653 |
7 |
| 136 | 28654 |
7 |
| 137 | 28655 |
12 |
| 138 | 28656 |
11 |
| 139 | 28662 |
14 |
| 140 | 28663 |
10 |