|Lincolnshire, Parts of Lindsey|
|- Origin||Kingdom of Lindsey|
|- Succeeded by||Lincolnshire, Humberside|
|Government||Lindsey County Council|
|- HQ||Newland, Lincoln|
Arms of the former Lindsey County Council
Lindsey was a unit of local government until 1974 in Lincolnshire, England, covering the northern part of the county. The Isle of Axholme, which is on the west side of the River Trent, has normally formed part of it. It originated with the Kingdom of Lindsey in Anglo-Saxon times, whose territories were merged with that of Stamford to form Lincolnshire.
Lindsey was itself divided into three ridings, the North, West and South Ridings and then into wapentakes. The West Riding covered the western part, including Gainsborough, Scunthorpe and Spital. The North Riding covered the north-east, including Barton upon Humber, Caistor, Cleethorpes, Brigg, Grimsby, and Market Rasen. The South Riding covered the rest, in the south-east, including Louth, Mablethorpe and Skegness. The point at which the Ridings touched was somewhere near Lissington.  Lindsey, like the other parts of Lincolnshire had long had a separate county administration (Quarter Sessions). In 1889, this division was followed in the establishment of the administrative county of Lincolnshire, Parts of Lindsey, which had an elected county council. Lincoln and Grimsby were independent county boroughs.
Within the rest of Lindsey there were various urban districts and rural districts, established by the Local Government Act 1894. The rural districts were Caistor, Gainsborough, Glanford Brigg, Grimsby, Horncastle, Isle of Axholme, Louth, Spilsby, Welton. A rural district of Sibsey also existed until 1936, when it was merged into Spilsby.
The Humberside phase
The Parts of Lindsey were abolished on 1 April 1974 as a result of the Local Government Act 1972. The area of the administrative county was divided between two new non-metropolitan counties: the northern area of Lindsey was placed in Humberside while the remainder passed to Lincolnshire.
|East Lindsey (Lincolnshire)||Rural districts of Horncastle, Louth and Spilsby;
Urban districts of Louth, Alford, Horncastle, Mablethorpe and Sutton, Skegness and Woodhall Spa.
|West Lindsey (Lincolnshire)||Rural districts of Caistor, Gainsborough, Welton;
Urban districts of Gainsborough and Market Rasen
|Cleethorpes (Humberside)||Rural district of Grimsby; Municipal Borough of Cleethorpes|
|Glanford (Humberside)||Rural district of Glanford Brigg; Urban districts of Barton and Brigg|
|Scunthorpe (Humberside)||Municipal Borough of Scunthorpe|
|Boothferry (Humberside)||Isle of Axholme Rural District; along with areas from the East and west Ridings of Yorkshire|
The map to the right, shows the districts of the now-defunct Humberside. The highlighted one is Glanford. To its east is Cleethorpes which surrounds Grimsby. To Glanford's west is Boothferry and the enclave within Glanford is Scunthorpe.
In 1996 these Humberside districts were re-grouped into unitary authorities. In other words, the new units perform the duties of both county and administrative district.
- One is North Lincolnshire (centred on Scunthorpe). This is the former districts of Glanford and Scunthorpe, as well as the Isle of Axholme which had become the southern part of Boothferry.
- The second is North East Lincolnshire comprising the former districts of Great Grimsby and Cleethorpes.
The two unitary authorities represent the most urbanised part of traditional Lincolnshire.