Ter Horst is a Dutchtoponymic surname. The original bearer of the name was from the horst, which is a historical indication of raised terrain covered with shrubs.People with the name include:
Guusje ter Horst (b. 1952), Dutch politician and government minister
Kate ter Horst (1906–1992), a.k.a. Angel of Arnhem, Dutch woman who tended wounded soldiers during the Battle of Arnhem