RIAU memiliki 214 kode pos unik
| # | Kode Pos | Jumlah Desa |
|---|---|---|
| 141 | 28664 |
8 |
| 142 | 28665 |
7 |
| 143 | 28684 |
9 |
| 144 | 28685 |
5 |
| 145 | 28686 |
10 |
| 146 | 28823 |
2 |
| 147 | 28824 |
2 |
| 148 | 28992 |
9 |
| 149 | 28993 |
5 |
| 150 | 29211 |
1 |
| 151 | 29212 |
1 |
| 152 | 29215 |
3 |
| 153 | 29217 |
1 |
| 154 | 29223 |
1 |
| 155 | 29224 |
1 |
| 156 | 29226 |
1 |
| 157 | 29252 |
4 |
| 158 | 29253 |
2 |
| 159 | 29254 |
12 |
| 160 | 29255 |
4 |