Elgin East was a federal electoral district represented in the House of Commons of Canada from 1867 to 1925.

In 1882, the East Riding of the county of Elgin was defined as consisting of the townships of Yarmouth, Malahide and Bayham, the villages of Port Stanley, Aylmer and Vienna, and the city of St. Thomas.

In 1903, the riding was redefined to exclude the township of Malahide and the city of St. Thomas, and to include the townships of Dorchester South and Malahide, and the village of Springfield.

The electoral district was abolished in 1924 when it was redistributed between Elgin West and Norfolk—Elgin ridings.

This riding has elected the following members of Parliament: On Mr. Harvey's death, 14 June 1874: On election being declared void: On Mr. Ingram's resignation, 8 December 1906, because of his appointment as Vice Chairman of the Ontario Railway and Municipal Commission: On Mr. Marshall's death, 14 February 1920: