K
- Kempton Nature Reserves
- Kendal Park (Hullbridge Foreshore)
- Kenilworth Common
- Kensington Meadows
- Kenwith
- Kersal Moor
- Kettlebrook – Tamworth
- Keyworth Meadow
- Killington Bridge – Yorkshire Dales National Park
- Kilminorth Woods
- Knapp Copse
- Kinewell Lake
- Kingfisher – Birmingham
- Kingmoor Sidings – Carlisle
- Kings Norton – Birmingham
- Kings Wood
- Kingsford Forest Park
- Kingsmead Marsh – Stafford
- Kingsthorpe
- Kingston and Bourn Old Railway
- Kingston Pool Covert (South) – Stafford
- Kingswinford Railway – South Staffordshire
- Kingswood and Glebe Meadows, Houghton Conquest
- Kinson Common
- Kirby Frith - Leicester
- Kirtlington Quarry
- Kites Croft
- Knapp Copse
- Knapton Cutting
- Knighton Spinney - Leicester
- Knott Hill Reservoir – Tameside, Greater Manchester
- Knowle Hill
- Kyo Bogs – Derwentside, Co Durham
Read more about this topic: List Of Local Nature Reserves In England