John Alexander Tarpoff (born April 5, 1980) is an American former rugby union international.
Born in St Louis, Tarpoff grew up in the metro area, attending Edwardsville High School, Illinois.
Tarpoff, a prop, played for professional Welsh club Llanelli in 2002.
Capped 12-times for the United States, Tarpoff was an international player from 2002 to 2006 and was a member of the national squad at the 2003 Rugby World Cup in Australia, but didn't take the field during the tournament.