The 1946 United States Senate election in New Jersey was held on November 5, 1946.
Republican incumbent H. Alexander Smith, who had been elected in a 1944 special election to complete the unexpired term of the late William Warren Barbour, was re-elected over Democrat George Brunner, the mayor of Camden.
As of , this is the most recent time New Jersey held multiple elections for statewide office on the same day; Alfred E. Driscoll was elected governor in a simultaneous election.
Senator Smith was unopposed for re-nomination.
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