is an American soccer player who plays as a midfielder. She played for Portland Thorns FC, Seattle Reign FC, and NJ/NY Gotham FC in the National Women's Soccer League, and represented the United States national team. She made her debut for the national team on May 8, 2014, in a friendly against Canada. She has since made 45 total appearances for the team.

Long played college soccer for the Penn State Nittany Lions for the 2005 and 2006 seasons before transferring to the University of North Carolina to play for the Tar Heels. Long was a member of the Tar Heels team that won the NCAA Women's Soccer Tournament in 2008. Professionally, Long has played for the Washington Freedom and Sky Blue FC of Women's Professional Soccer, Paris Saint-Germain of Division 1 Féminine in France, and the New York Fury of Women's Premier Soccer League Elite. She played for Portland Thorns FC of the National Women's Soccer League from 2013 to 2017.