By the time of Bishop Mason's death in 1961, COGIC had spread to every state in the Union and to many foreign countries; its membership was more than 400,000 and it had more than 4000 churches.
Vid Masons död 1961 hade COGIC spridit sig till samtliga delstater i USA och flera missionsländer och bestod av över 4000 församlingar med sammanlagt 400 000 medlemmar.