D. Allan Bromley (died February 10, 2005) was a Canadian-American physicist and a science advisor to President George H. W. Bush. Born in Ontario, Canada, he immigrated to the United States, and became a U.S. citizen in 1970.

Before being appointed to the Bush Cabinet, he was a member of President Ronald Reagan's White House Science Council. In 1988, Bromley was awarded the National Medal of Science.

While serving as Bush's science advisor, he pushed for major increases in scientific research funding so that the United States could compete with Japan and Germany in manufacturing. He also supported the expansion of the high-speed network which eventually became the Internet.

Following his public policy work, he served as a professor at Yale University.