Joseph Marmaduke Pratt (September 4, 1891 – July 19, 1946) was a Republican member of the U.S. House of Representatives from Pennsylvania.

Joseph M. Pratt was born in Paterson, New Jersey, but moved with his parents to Philadelphia, Pennsylvania, in 1892.

[1] Pratt was elected as a Republican to Congress to fill the vacancy caused by the resignation of James P. McGranery, defeating future congressman William A.

However, he died in Washington, D.C., from a heart attack while on a business trip before the election was held.

Pratt was interred in Arlington Cemetery in Upper Darby Township, Pennsylvania.