| Locality | Post Code |
|---|---|
| Manley | WA6 |
| Manley Common | WA6 |
| Marbury | CW9 6AR, CW9 6AS |
| Marlston-Cum-Lache | CH4 |
| Marston | CW9 |
| Marton | CW7 |
| Meadowbank | CW7 2PG, CW7 2PH, CW7 … |
| Mickle Trafford | CH2 |
| Milton Green | CH3 |
| Mollington | CH1 |
| Moston | CH2 |
| Mouldsworth | CH3 |
| Moulton | CW9 |
| Ness | CH64 |
| Neston | CH64 |
| Newton | CH2, WA6 |
| Newton-by-Tattenhall | CH3 |
| Nomans Heath | SY14 |
| Norcott Brook | WA4 4DX, WA4 4DY, WA4 … |
| Norley | WA6 |
| Northwich | CW8, CW9 |
| Oakmere | CW8 |
| Oathills | SY14 |
| Occleston | CW10 |
| Oldcastle | SY14 |
| Oscroft | CH3 |