American athletes won five of the nine medals awarded in track and field even though they were shut out of the women's 400-meter hurdles.
Shawn Crawford led the United States to a sweep in the men's 200, capturing gold ahead of teammates Bernard Williams and 100 winner Justin Gatlin.
It was the second sweep in a race for the Americans at these Games. Jeremy Wariner, Otis Harris and Derrick Brew finished 1-2-3 in the 400.
Crawford won in 19.79, Williams finished in 20.01 and Gatlin in 20.03.
Phillips jumped 8.59 meters in his first effort of the final and it stood up. American John Moffit was second and Joan Lino Martinez of Spain was third.
Phillips is the first American winner of the Olympic long jump since Carl Lewis in 1996.
Felix Sanchez of the Dominican Republic won the women's hurdles, followed by Jamaica's Danny McFarlane and France's Nama Keita.
The American sprint relay team, featuring Marion Jones, also advanced to Friday night's final.