Harriet Winsar Isom (born November 4, 1936) is an American retired diplomat and career Foreign Service Officer.

She served as the Chargé d'Affaires ad interim to Laos (August 1986 – August 1989) and Ambassador to Benin (January 26, 1990 – November 14, 1992) and Cameroon (August 17, 1992 – January 15, 1996),[1][2] Isom was born in Heppner, Oregon on November 4, 1936.

[3] She graduated from Mills College (B.A., 1958) and the Fletcher School of Law and Diplomacy (M.A.L.D., 1960).

[3] During Isom's tenure in Laos, an agreement was reached regarding US aide to Laos and Laos looking for Americans who had been missing since the Vietnam War.

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