First-past-the-post voting is a plurality voting system wherein voters cast a vote for a single candidate, and the candidate with the most votes wins the election. Analogous systems for multi-winner contests are known as plurality block voting or "block voting" systems; both FPTP and block voting are "plurality" systems in that the winner needs only a plurality of the votes and not an absolute majority. The term first-past-the-post is a metaphor from horse racing of the plurality-voted candidate winning such a race; the electoral system is formally called single-member [district] plurality voting (SMP/SMDP) when used in single-member districts, and informally called choose-one voting in contrast to ranked voting or score voting.

General elections were held in Saint Vincent and the Grenadines on 5 November 2020. Nomination day was 20 October 2020. The result was a victory for the Unity Labour Party, its fifth in a row; the party won nine of the fifteen seats, gaining one seat. These elections marked the first time since 1998 that the party which received the most votes did not win the most seats and the first time since 1994 that the New Democratic Party won the popular vote.