These were areas that were not part of the County of London and became formally part of Greater London in 1965. An exception is North Woolwich, which was in the County of London but was transferred to Newham in 1965.
The position is now less clear, as the census statistical classifications use different definitions mainly because Newham and Haringey have many of the characteristics of Inner London boroughs while inner-London Greenwich is more like an Outer London borough.
|Outer London (1965)|
|ONS's Outer London|
The outer London boroughs were defined by the London Government Act 1963.
According to the Office for National Statistics, Outer London excludes Newham and Haringey, but includes Greenwich. This is reflected in the UK classification. Under this classification, Outer London consists of Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Croydon, Ealing, Enfield, Greenwich, Harrow, Havering, Hillingdon, Hounslow, Kingston upon Thames, Merton, Redbridge, Richmond upon Thames, Sutton, and Waltham Forest.
1891, April 5/6 1,083,770
1901, March 31/April 1 1,647,396
1911, April 2/3 2,162,288
1921, June 19/20 2,413,978
1931, April 26/27 3,217,219
1939, Mid-year estimate 4,250,788
1951, April 8/9 4,517,588
1961, April 23/24 4,499,737
1971, April 25/26 4,420,585
1981, Midyear estimate 4,254,900
1991, Midyear estimate 4,230,000
2001, Midyear estimate 4,463,000
2003, Midyear estimate 4,483,300
2004, Midyear estimate 4,498,200
2005, Midyear estimate 4,532,100