Cosham

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Cosham
Location on map of United Kingdom
Statistics
Population:  ?
Ordnance Survey
OS grid reference: SU657052
Administration
Unitary authority: Portsmouth
Region: South of England
Constituent country: England
Sovereign state: United Kingdom
Other
Ceremonial county: Hampshire
Historic county: Hampshire
Services
Police force: Hampshire Constabulary
Fire and rescue: {{{Fire}}}
Ambulance: South Central
Post office and telephone
Post town: PORTSMOUTH
Postal district: PO6 2 & PO6 3
Dialling code: 023
Politics
UK Parliament: Portsmouth North
European Parliament: South East England

Cosham is a northern suburb of Portsmouth lying within the city boundary but off Portsea Island. It is mentioned in the Domesday Book of 1086 along with Drayton and Wymering (mainland) and Bocheland (Buckland), Frodington (Fratton) and Copenore (Copnor) on the island.

The name is of Saxon origin (shown by the -ham suffix) and means "homestead or enclosure of a man named Cossa" (Oxford Dictionary of British Place Names). It was predominantly pronounced Coss-am until the last 50 years, when standard usage has become Cosh-am. Until the 1920's it was a separate small village surrounded by fields (including on the north end of Portsea Island).

Extensive suburban growth then expanded around the village and both east and west along the slopes of Portsdown Hill. It has been for many years a local route centre; Cosham railway station was also the terminus for City trams and trolleybuses from the south and Portsdown and Horndean Light Railway trams to the north (until 1938). The High Street is a significant local shopping centre. Few traces of the original village now remain; the oldest houses (Chalk Cottage of 1777 and Mile Stone Cottages of 1793) were demolished in the 1960's and replaced by a car park, but the old milepost showing mileage to London, Petersfield and Portsmouth remains.

Cosham is also home to the UK headquarters of IBM UK Ltd. The site known as 'North Harbour' was built in the 70's, the location being selected due to the job cuts by the British Navy during the time.