William Charles Harris (born June 22, 1978 in Cairo, Georgia) is a left fielder in Major League Baseball for the Washington Nationals. Willie Harris is known for his quick feet and base-stealing abilities, with currently 94 career stolen bases. Harris was formerly a member of the Baltimore Orioles (2001), Chicago White Sox (2002-2005), Boston Red Sox (2006), and Atlanta Braves (2007). He bats left-handed and throws right-handed. He attended Kennesaw State University and lives in Cairo during the offseason. According to Major League Baseball, Willie Harris has a recorded height of 5'9" and weighs 185 pounds .

Versatility and speed are his biggest strengths, as Harris has the ability to play all three outfield positions as well as second base, where he started 28 games in 2005. He also started two games at shortstop in 2005. His most productive season came in 2004, when he posted career-numbers in average (.262), RBI (27), runs (68), hits (107), doubles (15) and at-bats (409). Harris also notched a career high of 19 stolen bases. In 2005, he stole 10 bases in 56 games.

In the 2005 playoffs, Harris went 2-for-2 in the postseason with an RBI, one stolen base, and one run scored. Harris's successful pinch-hit single in Game 4 of the 2005 World Series against the Houston Astros would prove to be decisive after Harris scored on an RBI single by Jermaine Dye. Not only was the run the game-winner, it was the only run which would be scored in the Series-clinching Game 4.