This study relates annual variations in U.S. suicide rates between 1972 & 1978 to annual variations in church attendance of representative subpopulations of the U.S. Variations in the suicide rates of white males, black males, white females & black females were significantly, inversely correlated with variations in the attendance of the respective subpopulations. Other significant findings are examined. The general hypothesis that religiosity deters suicide was supported. 16 ref.