Frederick Brockway Deknatel (March 9, 1905 – November 3, 1973) was an American art historian and educator.
Deknatel was the William Door Boardman Professor of Fine Arts at Harvard University from 1942 to 1972.
Deknatel married Virginia Herrick three years later, and received a Doctor of Philosophy in art history from Harvard University in 1935.
He wrote a doctoral dissertation on thirteenth-century Gothic sculpture in the Burgos and León Cathedral.
In 1950, Deknatel staged the first exhibition in the United States showcasing the work of the artist Edvard Munch.