John Blanchard (September 30, 1787 – March 9, 1849) was a Whig member of the U.S. House of Representatives from Pennsylvania. John Blanchard was born in Peacham, Vermont. He taught school, and graduated from Dartmouth College in Hanover, New Hampshire, in 1812. He moved to Pennsylvania in 1812 and settled in York, Pennsylvania, where he again taught school. 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 owned slaves.