John Blanchard (September 30, 1787 – March 9, 1849) was a Whig member of the U.S. House of Representatives from Pennsylvania.
He taught school, and graduated from Dartmouth College in Hanover, New Hampshire, in 1812.
He studied law, was admitted to the bar March 31, 1815, and commenced practice in Lewistown, Pennsylvania.
He moved to Bellefonte, Pennsylvania, the same year and continued the practice of law.
He died in Columbia, Pennsylvania, en route from Washington, D.C., to his home in 1849.