The purpose of this quantitative causal comparative study was to determine if there was a statistically significant difference in the six functional motivations to volunteer (Values, Understanding, Enhancement, Career, Social, and Protective) within a church among the four adult generational cohorts of Older Adults, Baby Boomers, Generation X, and Generation Y/Millennials represented in the non-Mormon Christian church congregations in Northern Utah. The theoretical foundations for this study included generational cohort theory and functional motivation theory. An EFA found a convergence of two factors, Enhancement and Protective, which had average factor loadings = 0.617. The mean difference in the Career scores between the four generation groups was statistically significant, F(3, 195) = 3.392, p = 0.019 with a medium effect-size in partial eta2 = 0.05. Post hoc analysis determined the statistically significant difference was found for the Career function between Baby Boomers and Generation Y/Millennials. A pairwise comparison using Dunnett's T3 revealed Baby Boomers was about 4.97 times lower on Career average scores compared to Generation Y/Millennials and statistically significant, p = 0.011 with 95% C.I. [-9.142, -0.803]. Similarly, pairwise comparison with Games-Howell also revealed Baby Boomers was about 4.97 times lower on Career average scores compared to Generation Y/Millennials and statistically significant, p = 0.010 with 95% C.I. [-9.036, -0.909].