| Incumbent re-elected. | nowrap | |- ! | Glenn Robert Davis | | Republican | 1947 1956 1964 | Incumbent re-elected. | nowrap | |- ! | Alvin O'Konski | | Republican | 1942 | Incumbent re-elected. | nowrap | |} Wyoming |- ! | Teno Roncalio | | Democratic | 1964 | | Incumbent retired to run for U.S. Senator.New member elected.Republican gain. | nowrap | |} See also 1966 United States elections 1966 United States gubernatorial elections 1966 United States Senate elections 89th United States Congress 90th United States Congress References Further reading "1966 Elections–A Major Republican Comeback." in CQ Almanac 1966 (22nd ed., 1967) pp 1387–88. online , plus articles on the other western states in the same issue , Focus on 1966 McLay, Mark. "A High-Wire Crusade: Republicans and the War on Poverty, 1966." Journal of Policy History 31.3 (2019): 382–405.