Saint Mary Knights of Columbus Council 9310 was founded in 1986. The Council works closely with St. Mary's Parish in League City, providing funds and labor for various projects. Members are active participants in the parish and involved in Pro-Life activities.

Monthly business meetings are held in Cargill Hall or the Church Library on the first Tuesday of the month. Catholic gentlemen 18 years and older are welcomed from 6:30-7:00 PM. Knights only starting at 7:00 PM.