Anthony Cosmo (born October 6, 1977 in Mississauga, Ontario) is a former professional lacrosse goaltender in the National Lacrosse League. Cosmo is a three-time NLL All-Star, and was named NLL Goaltender of the Year in 2007. Cosmo also plays for the Brampton Excelsiors (MSL) Major Series Lacrosse Senior A Men's league.
Cosmo began his lacrosse career with the Junior A Mississauga Tomahawks of the Ontario Lacrosse Association. He then went on to play for the Burnaby Lakers of the BC Junior A Lacrosse League. In 1998, playing with fellow stars Cam Sedgwick and Kaleb Toth, Cosmo and the Lakers won the Minto Cup.
Cosmo then went on to play for the Victoria Shamrocks of the Western Lacrosse Association. On September 16, 2005 the Shamrocks won their 8th Mann Cup, and he was named the series' Most Valuable Player.