The following is an alphabetical list of collieries in County Durham, from c.1850 to c.1990. Please click on a colliery name for further information or click on an initial letter to jump to collieries in that section.
- Nanny Pit (Lamesley)
- Nelly Pit (Lamesley)
- Nettlebed No. 3 [Pit] (Barony)
- Nettlesworth Colliery [1] (Plawsworth)
- Nettlesworth Colliery [2] (Plawsworth)
- Nettlesworth Dene Drift (Plawsworth)
- Nettlesworth Drift (Plawsworth)
- Nettlesworth Water Level Drift (Plawsworth)
- New Bell Pit (Iveston)
- New Bitchburn Pit (North Bedburn)
- New Brancepeth Colliery (Brandon & Byshottles)
- New Busty Drift (Lynesack & Softley)
- New Carterthorne Colliery (Barony)
- New Close Drift (Witton Gilbert)
- New Copley Colliery (Cockfield)
- New Etherley Colliery (Escomb)
- New Hargill Hill [Colliery] (Witton-le-Wear)
- New Harvey Drift (Lanchester)
- New Hollymoor [Colliery] (Cockfield)
- New House [Colliery] (Middridge Grange)
- New Hunwick [Colliery] (Hunwick & Helmington)
- New Hutton [Colliery] (Esh)
- New Lead Mill [Colliery] (Lynesack & Softley)
- New Louisa [Colliery] (Tanfield)
- New Morley Colliery (Hamsterley (det))
- New Paddock Mire Colliery (Evenwood)
- New Painshaw Pit (Penshaw)
- New Penshaw Pit (Penshaw)
- New Shildon [Colliery] (Shildon)
- New White Lea Colliery (Crook & Billy Row)
- New Winning Colliery (Castle Eden)
- New Witton Drift (North Bedburn)
- Newbottle Colliery (Dorothea Pit) (Newbottle)
- Newbottle Colliery [2] (Newbottle)
- Newbottle Margaret Pit (Newbottle)
- Newbottle [Colliery] [1] (Newbottle)
- Newfield Colliery (Newfield)
- Newfield Drift (Newfield)
- Newfield Drift (Pelton)
- Newfield Pit (Pelton)
- Newsham & Whorley Hill Colliery (Winston)
- Newsham Drift (Winston)
- Newton Cap Colliery (Newton Cap)
- Newton Colliery (Hunwick & Helmington)
- Nicholson's Pit (East Rainton)
- No. 6 Pit (Great Lumley)
- No. 7 Pit (Little Lumley)
- Noel Pit (Harraton)
- Norlees Colliery (Auckland St. Helen)
- North Bank Colliery (Whickham)
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