Joseph Maull (September 6, 1781 – May 3, 1846) was an American physician and politician from Lewes, in Sussex County, Delaware.

Maull studied medicine under Dr. John Wolfe of Lewes and spent the rest of his life as a practicing physician from his home in Milton, Delaware.

When he was governor he was opposed to the foreign policy of U.S. President James K. Polk, including the annexation of Texas.

Maull died at Lewes[citation needed] and is buried there at the St. Peter's Episcopal Churchyard.

The Maull House was added to the National Register of Historic Places in 1970, with a boundary increase in 1978.