Robert Douglas Heaton (July 1, 1873 – June 11, 1933) was 20th Century American businessman and politician who served two terms as a Republican member of the U.S. House of Representatives from Pennsylvania from 1915 to 1919.

Robert D. Heaton was born in Raven Run, Pennsylvania.

He did not seek renomination in 1918, having become a candidate for the Pennsylvania State Senate.

He resumed his former business activities, and served as a member of the board of trustees of the Ashland State Hospital.

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