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- Paddington Meadows - Warrington
- Padworth Common
- Pagham Harbour
- Palmers Rough – Solihull, West Midlands
- Palmerston Park Wood
- Pamber Forest
- Par Beach and St. Andrews Road
- Paradise - Cambridge
- Park Lime Pits – Walsall
- Park Wood
- Park Wood, Bedford – Bedford
- Park Wood, Coventry – Coventry
- Park Woods, Gouldings Wood – Windsor & Maidenhead
- Parkland Walk – Haringey & Islington
- Parliament Piece
- Parndon Woods & Common
- Parr Hall Millennium Green
- Parsloe's Park Squatts
- Pearman's Copse
- Pelaw Quarry Pond
- Pelsall North Common – Walsall
- Pennington's Copse, Alder Bed & Broadmoor Coppice
- Pennytown Ponds – Amber Valley, Derbyshire
- Perivale Wood
- Perry Wood
- Pevensey Road
- Pewit Carr – Derbyshire
- Pewley Down
- Philips Park, Bury – Bury
- Phoenix Parkway – North Lincolnshire
- Pickerings Pasture – Widnes
- Pickers Ditch Meadow
- Pig Wood
- Piggy Wood
- Pilsey Island
- Pine Springs, Poole – Poole
- Pioneer Meadows – Erewash, Derbyshire
- Pipers Vale
- Pity Me Carrs – Co Durham
- Plants Hill Wood
- Plantsbrook Reservoirs – Birmingham
- Pleasley Vale
- Poise Brook - Stockport
- Pool Dam Marshes – Newcastle-under-Lyme
- Pope Lane Open Space - Preston
- Popley Ponds
- Porter Valley Woodlands – Sheffield
- Portland Park
- Portrack Marsh Nature Reserve
- Portrack Meadows
- Potter Holes Plantation
- Potterne Hill
- Poulton Wood, Aldington
- Poynton Coppice – Cheshire East
- Preston Junction
- Prestwick Road Meadows
- Prestwood Picnic Site
- Priestclose Wood
- Primrose
- Prince's Beachlands
- Prince's Plot, Charminster
- Priory Woods – Sandwell, West Midlands
- Proctor's Barn Meadows
- Pugneys Country Park
- Pugs Hole
- Purewell Meadows
- Purwell Meadows
- Putnoe Wood
- Pyl Brook
Read more about this topic: List Of Local Nature Reserves In England