|Full name||Justin Mapp|
|Date of birth||October 18, 1984|
|Place of birth||Brandon, Mississippi, United States|
|Height||5 ft 11 in (1.80 m)|
|Playing position||Left Winger|
|2000–2001||IMG Soccer Academy|
|2016||Sporting Kansas City||6||(0)|
|2001||United States U17||3||(0)|
|2003||United States U20||5||(1)|
* Senior club appearances and goals counted for the domestic league only and correct as of November 14, 2016|
‡ National team caps and goals correct as of March 31, 2010
Justin Mapp (born October 18, 1984) is a retired American soccer player who played as a midfielder. Mapp has been described as being versatile and known for possessing "speed and creative abilities from out wide, but also his ability to drift inside and generate offense."
Mapp graduated from the Bradenton Academy in 2001 and signed with MLS as a Project-40 player. He was drafted by D.C. United with the fourth overall pick in the 2002 MLS SuperDraft, but played only 28 minutes for DC in his first year as a pro. The Chicago Fire acquired Mapp for Dema Kovalenko before the 2003 season, and he has been an important player in the squad since, helping them to the 2003 US Open Cup. In two seasons with the Fire, Mapp scored six goals and added seven assists.
After eight years with Chicago, Mapp was traded to Philadelphia Union on July 26, 2010 in exchange for allocation money. Mapp won "MLS Player of the Week" honors in Week 11 of the 2011 season for his 2-goal performance in the club's 6-2 win against Toronto FC. This performance earned the recognition of the North American Soccer Reporters society. One of his goals was even nominated for the MLS Goal of the Week award. On June 8, Mapp was named a nominee for the MLS All-Star Game. On June 28, he was said to be leading in text voting for the All-Star Game.
After a season and a half with Philadelphia, Mapp was selected by expansion franchise Montreal Impact in the 2011 MLS Expansion Draft on November 23, 2011. He said he was surprised to be unprotected by the Union. On May 29, 2013 Mapp was awarded the 2013 George Gross Memorial Trophy for his play in the Canadian Championship, leading Montreal to victory over Vancouver Whitecaps FC in the final. A year later, he claimed the award again after Montreal defeated Toronto FC in the 2014 final making him one of only two players, the other being Dwayne De Rosario, to win the award twice.
After his contract expired following the 2015 season, Mapp signed with Sporting Kansas City, becoming the first free agent signing in MLS history. He played six times for Kansas before retiring at the end of 2017. 
Mapp has played for various youth United States national teams, including the 2001 Under-17 World Championship in Trinidad and Tobago. He started all five matches for the U.S. in the 2003 World Youth Championship in the United Arab Emirates. Mapp made his debut for the senior team on October 12, 2005 against Panama. Mapp also came on as a sub January 20, 2007 against Denmark, running 70 yards with the ball before setting up Jonathan Bornstein's game-winning goal. He also played for USA in Copa América 2007.
- As of December 14, 2015.
|Club performance||League||Cup||League Cup||Continental||Total|
|USA||League||Open Cup||MLS Cup||North America||Total|
|2002||D.C. United||Major League Soccer||3||0||0||0||0||0||0||0||3||0|
|Canada||League||Voyageurs Cup||MLS Cup||North America||Total|
|2012||Montreal Impact||Major League Soccer||27||2||2||0||–||–||29||2|
- As of September 21, 2014.
Mapp and girlfriend Kathleen Hilario had a child they named Jackson Sanders Mapp on March 24th 2016. 
- French, Scott. "Three for Thursday: USMNT candidates no one is talking about, but soon will be". mlssoccer.com. Retrieved June 7, 2013.
- "Union Acquire Midfielder Justin Mapp". July 26, 2010.
- "Union midfielder Mapp earns Player of the Week award". May 30, 2011.
- "VOTE: Mapp for Goal of the Week". May 30, 2011.
- "With a week left in All-Star fan voting, see latest results". June 28, 2011.
- "Mapp selected by Impact in 2011 Expansion Draft". November 23, 2011.
- "Justin Mapp wins 2013 George Gross Trophy". Canadian Soccer Association. May 29, 2013. Retrieved May 30, 2013.
- "Montreal's Mapp wins 2014 George Gross Memorial Trophy - Canada Soccer". www.canadasoccer.com.
- "Sporting KC signs free agent midfielder Justin Mapp". December 14, 2015.