Duane Alexander (born August 11, 1940 in Baltimore, Maryland) is an American medical doctor who was the director of the National Institute of Child Health and Human Development from 1986 through 2009.
In 2009 he moved to the position of senior scientific advisor to the Director of the NIH's Fogarty International Center.
Alexander married Marianne Ellis in 1963.
They have two children, Keith and Kristin.
He received his MD from Johns Hopkins.