Dennis Crowley (born June 19, 1976) is an American Internet entrepreneur who co-founded the social networking sites Dodgeball and Foursquare.

[2][3][4][5] After graduating from Syracuse, Crowley worked as a researcher for Jupiter Communications, but lost his job during the dot-com bubble and moved home to New Hampshire for seven months.

[4][7] After Google abandoned the Dodgeball project in 2007,[8][9] Crowley found work at a company called Area/Code where he met Naveen Selvadurai and co-founded Foursquare in 2009.

[21] In 2012, Crowley received the George Arents Award for Excellence in Social Media Innovation from Syracuse University.

[22][23] Crowley married Chelsa Lynn Skees at Buttermilk Falls Inn in Milton, N.Y. Sarah Simmons, a Universal Life Church minister, officiated.