Progressive National Baptist Convention, Inc. (PNBC), association of Black Baptist churches, organized in 1961 in Cincinnati, Ohio, U.S. It developed from a group of Black Baptists who left the National Baptist Convention, U.S.A., Inc., because they disagreed with the procedure for electing officers of the convention. The newly formed PNBC movement vocally supported the American civil rights movement and provided a denominational home for Dr. Martin Luther King, Jr., and many of the movement’s other Black Baptist leaders. The first annual convention of the new church was held in 1962.