Conor Casey (born July 25, 1981 in Gilpin , Colorado) is an American soccer player, who currently plays striker for Mainz of the German Bundesliga.

Casey played two years of college soccer at the University of Portland for legendary coach Clive Charles, from 1999 to 2000. In his first year at Portland, Casey was named Soccer America's Freshman of the Year. In his second, he led the NCAA in scoring with 23 goals and 7 assists.

After playing well in the 2000 Olympics, Casey signed a four year contract with German giants Borussia Dortmund. After playing a year for the Dortmund reserves, Casey was loaned out in the 2001-2 season to second division club Hannover 96, where he scored 7 goals in 19 games, helping the club reach the first division. The subsequent year, Casey stayed with Dortmund, but only saw action in four games, scoring one goal. In 2003-4, he was again loaned to a second division club, Karlsruhe, where he established himself as one of the best young forwards not in the top-flight, scoring 14 goals in 30 games. During the 2004 offseason, Casey was sold to Mainz for approximately 300,000 Euros.

Casey plated at the 2001 World Youth Championship in Argentina and has seen graduated to the senior US national team, getting his first of six caps on March 31, 2004 against Poland. He is seen as some as the eventual successor of target forward Brian McBride.