Coordinates: 51°32′23″N 0°08′32″E / 51.5397°N 0.1422°E
Dagenham is a large suburb of east London, England. It forms part of the London Borough of Barking and Dagenham and is located approximately 11.5 miles (18.5 km) east of Charing Cross and around 9.5 miles (15.2 km) east of the City of London. Historically in Essex, it was an agrarian village and remained mostly undeveloped until 1921, when the London County Council began construction of the large Becontree estate. The population of the area significantly increased during the 20th century, with the parish of Dagenham becoming an urban district in 1926 and a municipal borough in 1938. It has formed part of Greater London since 1965 and is a predominantly residential area, with some areas of declining industrial activity, including the Ford Dagenham plant. The southern part of Dagenham is also known as South Romford and is also adjacent to the River Thames, forms part of the London Riverside section of the Thames Gateway redevelopment area. Dagenham had a population of 43,362 in 2011.
Dagenham was a borough constituency represented in the House of Commons of the UK Parliament that elected one Member of Parliament (MP) by the first past the post system of election. It was replaced at the 2010 general election largely by Dagenham and Rainham.
1945-1974: The Municipal Borough of Dagenham.
1974-1983: The London Borough of Barking wards of Chadwell Heath, Eastbrook, Fanshawe, Heath, River, Valence and Village.
1983-2010: The London Borough of Barking and Dagenham wards of Alibon, Chadwell Heath, Eastbrook, Fanshawe, Heath, Marks Gate, River, Triptons, Valence and Village.
Following their review of parliamentary representation in North London, the Boundary Commission for England have created a new constituency of Dagenham and Rainham.
Before 1945 this Dagenham and surrounds area was part of the Romford constituency.
The MP for the predecessor seat since 1935, Labour's John Parker, stood again on each occasion in this smaller successor area, representing it until 1983. Parker was the last serving MP to have been elected before the Second World War, and with 48 years in Parliament, remains the longest-serving Labour MP in history.