Andrew Buchanan (April 8, 1780 – December 2, 1848) was a member of the U.S.
House of Representatives from Pennsylvania.
Andrew Buchanan was born in Chester County, Pennsylvania.
He graduated from Dickinson College in Carlisle, Pennsylvania.
He studied law, was admitted to the bar in 1798 and commenced practice in York, Pennsylvania.
He located in Waynesburg, Pennsylvania, in 1803.
He served as a member of the Pennsylvania House of Representatives and in the Pennsylvania State Senate.
Buchanan was elected as a Jacksonian to the Twenty-fourth Congress, and as a Democrat to the Twenty-fifth Congress.
He served as chairman of the United States House Committee on Elections during the Twenty-fifth Congress.
He resumed the practice of his profession until his death in Waynesburg in 1848.