RIAU memiliki 214 kode pos unik
| # | Kode Pos | Jumlah Desa |
|---|---|---|
| 101 | 28516 |
1 |
| 102 | 28517 |
1 |
| 103 | 28518 |
1 |
| 104 | 28519 |
6 |
| 105 | 28553 |
4 |
| 106 | 28554 |
5 |
| 107 | 28555 |
14 |
| 108 | 28556 |
10 |
| 109 | 28558 |
11 |
| 110 | 28559 |
9 |
| 111 | 28565 |
11 |
| 112 | 28566 |
8 |
| 113 | 28567 |
6 |
| 114 | 28568 |
3 |
| 115 | 28569 |
7 |
| 116 | 28571 |
6 |
| 117 | 28572 |
13 |
| 118 | 28573 |
5 |
| 119 | 28575 |
11 |
| 120 | 28612 |
1 |