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- Ladderedge Country Park – Staffordshire Moorlands
- Ladies' Mile Open Space
- Lairage Land
- Lakeside Park, Aldershot – Guildford
- Lancing Ring
- Landguard Common
- Lanercost
- Langcliffe & Attermire – Yorkshire Dales National Park
- Larkey Valley Wood
- Lattersey Field
- Laugherne Brook
- Lavells Lake
- Lavender Pond
- Lawrence Western Moor
- Leam Valley
- Leathes Ham
- Leigh Common
- Ley Valley - Oxford
- Lesnes Abbey Woods
- Letchmire Pastures – Leeds
- Levan Strice
- Lexden Park
- Limbrick Wood – Coventry
- Limekiln Close (and West Pitt) - Cambridge
- Limekiln Gill – Co Durham
- Limekiln Wood – Telford and Wrekin
- Linby Trail
- Linders Field
- Lindow Common – Cheshire East
- Line Wood
- Linford Wood
- Lingfield Wildlife Area
- Lings Wood Nature Reserve
- Linthorpe Cemetery – Middlesbrough
- Lion Wood
- Liss Riverside Railway Walk (North)
- Liss Riverside Railway Walk (South)
- Litcham Common
- Litten Nature Reserve
- Little Downham
- Little Mountain Common
- Little Paxton Pits
- Little Wood – Co Durham
- Loftus Wood – Redcar and Cleveland
- Logan's Meadow - Cambridge
- Lollycocks Field – North Kesteven, Lincs
- Lomeshaye Marsh
- Long Wood (+ Hounslow)
- Longmoor Bog
- Longton Brickcroft - Preston
- Lonsdale Road (Leg of Mutton) Reservoir
- Lopwell Dam
- Lousehill Copse (Part of West Reading Woodlands)
- Low Hall Park - Wigan
- Low Newton Junction – Co Durham
- Lower Spen Wildlife Area
- Lower Wandle
- Lowerhouse Lodges – Burnley
- Loxley & Wadsley Common – Sheffield
- Lucas Marsh – Oadby and Wigston, Leicestershire
- Luscombe Valley
- Lye Valley
- Lymington and Keyhaven Marshes
- Lynchmere Commons
- Lyppard Grange
- Lytham St Annes – Fylde, Lancs
Read more about this topic: List Of Local Nature Reserves In England