Lincolnshire and Humberside South (European Parliament constituency)

Prior to its uniform adoption of proportional representation in 1999, the United Kingdom used first-past-the-post for the European elections in England, Scotland and Wales. The European Parliament constituencies used under that system were smaller than the later regional constituencies and only had one Member of the European Parliament each.

The constituency of Lincolnshire and Humberside South was one of them.

It consisted of the Westminster Parliament constituencies of Brigg and Cleethorpes, East Lindsey, Gainsborough and Horncastle, Grantham, Great Grimsby, Holland with Boston, and Lincoln.