John Taddeus Heard (October 29, 1840 – January 27, 1927) was a Democratic Representative representing Missouri from March 4, 1885, to March 3, 1895.

He was admitted to the bar in 1862 and practiced law in Sedalia, Missouri.

He died on January 27, 1927, while on a visit to Los Angeles, California.

He is buried in Crown Hill Cemetery in Sedalia.

The John T. and Lillian Heard House at Sedalia was listed on the National Register of Historic Places in 2011.