Róbert Zimonyi (18 April 1918 – 2 February 2004) was a Hungarian-born American rowing coxswain.

He competed for Hungary in various events at the 1948 and 1952 Olympics and won a bronze medal in coxed pairs.

After the Hungarian Revolution of 1956, he moved to the United States and became an American citizen in 1962.

He was an accountant by training, but after immigrating to the United States, he worked at a brick company of a fellow rower John B. Kelly Sr.[5] In 1963, he became an accountant at Sandmeyer Steel, and worked there until retiring by age in 1983.

[6] After that he moved to Florida to improve his health, together with his partner, Isabel Gressner.