Portchester shown within Hampshire
|OS grid reference|
|Sovereign state||United Kingdom|
|Postcode district||PO16 - PO17|
|EU Parliament||South East England|
Portchester is a locality and suburb 4 miles (6 km) northwest of Portsmouth, England. It is part of the borough of Fareham in Hampshire. Once a small village, Portchester is now a busy part of the expanding conurbation between Portsmouth and Southampton, on the A27 main thoroughfare. Its population according to the 2001 Census was approximately 17,000 residents.
The fort of Portus Adurni is considered the best preserved Roman fort north of the Alps. The name Portchester is of partly Roman origin, from Latin portus (a harbour) and Old English ceaster (Roman fort). The medieval Portchester Castle was built within the fort.
As well as the castle, its Grade I Listed parish church St Mary's and the abundance of historic houses in Castle Street, this suburb is well placed for waterfront leisure activities, only a short distance from the UK's third largest marina at Port Solent, and from the historic city of Portsmouth and the market town of Fareham.
Public open spaces
- Portchester Castle
- Portsdown Hill - Including Portchester Common a Site of Special Scientific Interest (SSSI)
- Wicor Recreation Ground - Home to A.F.C. Portchester and Wicor Skate Park.
- Portchester Community School, a mixed comprehensive community school for 11–16 year olds.
- Wicor Primary School
- Northern Infant School
- Northern Junior School
- Red Barn Primary School
- Castle Primary School
Sport and leisure
- Neil Astley, publisher and founding editor of Bloodaxe Books, born in Portchester
- Emily Farmer, watercolour painter
- Neil Gaiman, author, born in Portchester
- Steve Ridgway, Chief Executive, Virgin Atlantic Airways
- Mike Hancock, MP for Portsmouth South and Councillor for Fratton ward, has lived here for over 30 years.
Portchester railway station is managed and operated by South West Trains with frequent Southern Railway services. Services run along the coast to Southampton, Fareham, Portsmouth, Havant, Chichester and Brighton. London services to London Waterloo (via Fareham) and London Victoria (via Barnham) also stop at the station.
The A27 road cuts through the centre of Portchester running east/west between Fareham and Cosham on the northern outskirts of Portsmouth. Access to the M27 motorway is via Junction 11 at Fareham or Junction 12 at Port Solent
Portchester is twinned with:
- Port Chester, New York (2010-present)
- Goodall, John (2008) , Portchester Castle, London: English Heritage, p. 3, ISBN 978-1-84802-007-8
-  Sunday Telegraph Issue No:2,409 12 August 2007
-  St Mary's Portchester
- B. S. Long, "Farmer, Emily (1826–1905)", rev. Charlotte Yeldham, Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 8 Aug 2007
- What's fame got to do with it?, Frances Atkinson, The Age, 24 July 2005