Glenn Richard Simpson (born 1964) is an American former journalist who worked for The Wall Street Journal until 2009, and then co-founded the Washington-based research business Fusion GPS. He was also a senior fellow at the International Assessment and Strategy Center. He is the co-author of Dirty Little Secrets: The Persistence of Corruption in American Politics written with political scientist Larry Sabato and published in 1996. A New York Times book review called the book's approach "fiercely bipartisan".