Collieries M-R
| Colliery | Alternative Name | Location | Opened | Closed | Notes |
| Mackintosh | Coleford | Merged with Newbury | |||
| Malago | Bedminster | 1897 | |||
| Mangotsfield | Mangotsfield | ||||
| Mangotsfield Common | Mangotsfield | ||||
| Marsh Lane | Farrington No 2 | Farrington Gurney | |||
| Mells | Mells | ||||
| Middle Pit | Radstock | Part of Radstock | |||
| Miniature | Soundwell | ||||
| Moorewood | Ashwick | 1932 | |||
| Nettlebridge | |||||
| New | Mangotsfield | ||||
| Newbury | Coleford | 1927 | Merged with Mackintosh | ||
| New Cheltenham | |||||
| New Marsh | |||||
| New Rock | Downside | ||||
| New Soundwell | Soundwell | 1923 | |||
| New Vobster | |||||
| New Welton | |||||
| North Yate | Yate | ||||
| Norton Down | |||||
| Norton Hill | Midsomer Norton | ||||
| Old Grove | Timsbury | ||||
| Oldland | |||||
| Old Mills | Paulton | Merged with Springfield | |||
| Old Vobster | |||||
| Old Welton | Radstock | Merged with Clandown | |||
| Oxenhall | |||||
| Parkfield | Pucklechurch | ||||
| Paulton Engine | |||||
| Pennywell Road | Easton | 1880 | |||
| Pensford | Pensford | ||||
| Potter's Wood & Joys | |||||
| Priston | Priston | 1930 | |||
| Pyle Marsh | |||||
| Radford | |||||
| Radstock | Radstock | ||||
| Rangeworthy | |||||
| Rangeworthy Pit | |||||
| Rangeworthy Slope | |||||
| Rawyate |