John Rea (January 27, 1755 – February 26, 1829) was an early 19th-century American politician.
Rea served as lieutenant and captain with the Cumberland County Militia during the Revolutionary War.
On October 20, 1784, Rea was commissioned the first coroner of Franklin County, Pennsylvania.
He then served in the War of 1812 as major general of the Eleventh Division of Militia.
Following the death of Robert Whitehill, Rea was elected to the Thirteenth Congress, and served from May 11, 1813 until March 3, 1815.