Immingham is a town and civil parish in North East Lincolnshire, in Lincolnshire, England. It is situated on the south-west bank of the Humber Estuary, and is six miles northwest of Grimsby. The region was relatively unpopulated and undeveloped until the early 1900s, when the Great Central Railway began developing its Immingham Dock; as a consequence of the dock development, and of nearby post-Second World War large scale industrial developments Immingham developed from a minor place into a significant town during the 20th century. The Port of Immingham & Grimsby was the largest port in the United Kingdom by tonnage with 54 million tonnes of cargo passing through in 2019.