1946 United States Senate election in Wyoming

The 1946 United States Senate election in Wyoming took place on November 5, 1946. Democratic senator Joseph C. O'Mahoney ran for re-election to a third term. In the general election, he faced Republican Harry B. Henderson, the former chairman of the Republican Party of Wyoming and a former state senator. Despite the strong performance of the Republican Party nationally, O'Mahoney's popularity was strong enough for him to win re-election yet again by a wide margin, though slightly narrower than his 1940 re-election.

1946 United States Senate election in Wyoming

November 5, 1946

Nominee Joseph C. O'Mahoney Harry B. Henderson Party Democratic Republican Popular vote 45,843 35,714 Percentage 56.21% 43.79%

County results O'Mahoney:      50–60%      60–70% Henderson:      50–60%      60–70%

U.S. senator before election Joseph C. O'Mahoney Democratic Elected U.S. Senator Joseph C. O'Mahoney Democratic

Democratic primary

Candidates

• Joseph C. O'Mahoney, incumbent U.S. Senator

Results

Democratic primary

Party		Candidate	Votes	%
	Democratic	Joseph C. O'Mahoney (inc.)	17,589	100.00%
Total votes			17,589	100.00%

Republican primary

Candidates

• Harry B. Henderson, former chairman of the Republican Party of Wyoming, former state senator, 1940 Republican candidate for the U.S. Senate

Results

Republican primary

Party		Candidate	Votes	%
	Republican	Harry B. Henderson	22,757	100.00%
Total votes			22,757	100.00%

General election

Results

1946 United States Senate election in Wyoming

Party		Candidate	Votes	%	±%
	Democratic	Joseph C. O'Mahoney (inc.)	45,843	56.21%	−2.53%
	Republican	Harry B. Henderson	35,714	43.79%	+2.53%
Majority			10,129	12.42%	−5.05%
Turnout			81,557
	Democratic hold