William Robert Rivkin (April 16, 1919 – March 19, 1967)[1] was a United States diplomat who served as ambassador to Luxembourg, Senegal, and Gambia in the 1960s.

After graduation from Iowa, Rivkin joined the United States Army, where he rose to the rank of lieutenant colonel during World War II.

He was awarded the Bronze Star and received the French l'ordre de la santé publique, rank of chevalier.

They had four children: In 1971, Enid remarried to Dr. John Sterry Long and dedicated the rest of her life to humanitarian causes particularly focusing on the delivery of medical and food aid to distressed populations in remote regions of the world.

[1] The annual Rivkin award of the United States Foreign Service is presented in his honour.