Cistothorus is a genus of birds in the Troglodytidae family. It contains the following species: Apolinar's wren, Cistothorus apolinari Mérida wren, Cistothorus meridae Marsh wren or long-billed marsh wren, Cistothorus palustris Sedge wren, short-billed marsh wren or grass wren, Cistothorus platensis↑