Donald Burnham Ensenat (born February 4, 1946) is a retired American diplomat.

He is a graduate of the Isidore Newman School in New Orleans, Yale University, and the Tulane University Law School.

As an undergraduate, he was a roommate of George W. Bush at Yale College.

In the 1960s and 1970s, Ensenat served as a military reservist.

Ensenat is a lawyer, and formerly served as Ambassador to Brunei.