David Cromwell (born 1962) is a British media campaigner and oceanographer. With David Edwards, he is a co-editor of the Media Lens website. Cromwell was born in Glasgow. His mother was a practicing Catholic while his father was an activist and communist sympathiser. He spent his formative years in Barrhead and, mostly, Cumbernauld and graduated from the University of Glasgow with a degree in physics and astronomy. After completing a PhD in solar physics from the same university, which he was awarded in 1987, Cromwell moved to the United States in 1988 to pursue a year-long postdoctoral research at the National Center for Atmospheric Research in Boulder, Colorado.