OL
16 districts, 13,207 postcodes
Oldham, Rochdale, Tameside, Rossendale, Calderdale, Burnley
| District | Postcodes | Local authority |
|---|
| OL1 | 779 | Oldham |
| OL10 | 817 | Rochdale |
| OL11 | 1,076 | Rochdale |
| OL12 | 1,184 | Rochdale |
| OL13 | 657 | Rossendale |
| OL14 | 788 | Calderdale |
| OL15 | 539 | Rochdale |
| OL16 | 1,125 | Rochdale |
| OL2 | 1,090 | Oldham |
| OL3 | 595 | Oldham |
| OL4 | 1,048 | Oldham |
| OL5 | 370 | Tameside |
| OL6 | 899 | Tameside |
| OL7 | 420 | Tameside |
| OL8 | 848 | Oldham |
| OL9 | 972 | Oldham |