John Austin Wharton (April 1806 – December 17, 1838) was distinguished Texian statesman, lawyer, and soldier.

In a eulogy at his grave, Republic of Texas President David G. Burnet said of him, "The keenest blade on the field of San Jacinto is broken."

He became an orphan in 1816 and was raised, along with his four siblings by his uncle Jesse Wharton who ensured that he received a classical education.

Previously, in December 1835, Sam Houston had appointed Wharton as Texas's agent in New Orleans to procure supplies for the coming conflict; and was responsible for bringing the cannons known as the "Twin Sisters" to the Texian army.

Wharton fought bravely during the Battle of San Jacinto, where Mexican strongman Antonio Lopez de Santa Ana was captured.