The Dömös Chapter was a collegiate chapter, established around 1107, in the Kingdom of Hungary. It was dedicated to Saint Margaret of Antioch.
Duke Álmos – the younger brother of Coloman the Learned, King of Hungary – established the collegiate chapter at Dömös around 1107. According to historian György Györffy, the duke set up the chapter after he returned from his pilgrimage in the Holy Land, taking a relic of Saint Margaret of Antioch with him. Scholar László Koszta writes that Duke Álmos had established the chapter, dedicated to Saint Margaret, before he departed for the pilgrimage.