General elections were held in Saint Lucia on 26 July 2021, having been constitutionally required by 12 October 2021. Voters elected all 17 members of the House of Assembly. The result was a victory for the opposition Saint Lucia Labour Party, which won 13 of the 17 seats in the House, while the ruling United Workers Party lost nine of its eleven seats, its worst result since 1997. It was the fourth consecutive election in which the incumbent government was defeated.

Saint Lucia is an island country of the West Indies in the eastern Caribbean. The island was previously called Iouanalao and later Hewanorra, names given by the native Arawaks and Caribs (respectively), two Amerindian peoples. Part of the Windward Islands of the Lesser Antilles, it is located north/northeast of the island of Saint Vincent, northwest of Barbados and south of Martinique. It covers a land area of 617 km2 with an estimated population of over 180,000 people as of 2018. The nation's capital and largest city is Castries.