1806 United States Senate election in Pennsylvania
December 9–16, 1806
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The 1806 United States Senate election in Pennsylvania was held from December 9 to 16, 1806, to elect a U.S. Senator to represent Pennsylvania in the Class 3 seat. Andrew Gregg, a Democratic-Republican, was elected by the Pennsylvania General Assembly, defeating fellow Democratic-Republicans Nathaniel Boileau and Isaac Weaver Jr. Incumbent Senator George Logan, also a Democratic-Republican, who was elected in a special election in 1801, did not seek re-election.