Robert Foster Maddox (April 4, 1870 – 1965) was the 41st Mayor of Atlanta, Georgia.

He was chairman of the board of the Atlanta & Lowry National Bank part of which had been founded by his father.

In 1908, he served as a Fulton County commissioner and the next year he was elected Atlanta's mayor.

He had an active term, issuing the city's first large bond ($3 million) which was used for new schools, sewage disposal plants and enlarging the Atlanta Water Works.

He also had built an addition to Grady Memorial Hospital and via many trips to Washington, D.C., was able to purchase the old post office for $70,000 to be used as the City Halls of Atlanta.