The Roman Catholic Diocese of Kingstown (Latin: Dioecesis Regalitana) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in the Caribbean.

The diocese comprises the entirety of the nation of Saint Vincent and the Grenadines.

The Diocese of Kingstown was erected on 23 October 1989 by Pope John Paul II.

The founding bishop was Robert Rivas, who served since the inception of the diocese to 2007 when he was appointed Coadjutor Archbishop of the Archdiocese of Castries.

Pio Atonio M.F., who oversaw the everyday running of the diocese.