The United States was the host nation of the 1984 Summer Olympics in Los Angeles, California. It was the nineteenth time that Team USA participated, having boycotted the 1980 Summer Olympics. 522 competitors, 339 men and 183 women, took part in 217 events in 25 sports.
These Olympic Games were unique for the United States in that the host state was California, the home state of the country's president, Ronald Reagan, who himself opened the Games, becoming the first American president to open a Summer Olympics, and also any Olympic games in the United States. Reagan was governor of the state from 1967 to 1975. It was not until the 2002 Winter Olympics in Salt Lake City that an American president opened a Winter Olympics in the United States.
The United States topped the medal count for the first time since 1968, winning a record 83 gold medals and surpassing the Soviet Union’s total of 80 golds at the 1980 Summer Olympics.
Medalists
The following U.S. competitors won medals at the games. In the by discipline sections below, medalists' names are bolded.
|style="text-align:left; width:74%; vertical-align:top;"|
| style="text-align:left; width:26%; vertical-align:top;"|
* - Indicates that the athlete competed in preliminaries but not the final.
Archery
The United States returned to archery competition with a dominant men's team that earned the top two spots. Their women were not as successful against the newly powerful Asian teams from Korea, China, and Japan, but still managed to place an archer in the top eight.
Athletics
Men
Road and track events
- Indicates the athlete ran in a preliminary round but not the final.
Field events
Combined event – Decathlon
Women
Road and track events
- Indicates the athlete ran in a preliminary round but not the final.
Field events
Combined event – Heptathlon
Basketball
Summary
Men's tournament
Roster
Head coach: Bob Knight
Preliminary round
Group B
Quarterfinal
Semifinal
Gold medal game
Women's tournament
Roster
Cathy Boswell
Denise Curry
Anne Donovan
Teresa Edwards
Lea Henry
Janice Lawrence
Pamela McGee
Carol Menken-Schaudt
Cheryl Miller
Kim Mulkey
Cindy Noble
Lynette Woodard
Preliminary round
Gold medal game
Boxing
Canoeing
Men
Women
Key: QF – Qualified to medal final; SF – Qualified to semifinal; R – Qualified to repechage
Cycling
Twenty cyclists represented the United States in 1984.
Road
Men
Women
Track
Points race
Pursuit
Sprint
Time trial
Diving
Men
Women
Equestrian
Dressage
Eventing
Jumping
Fencing
Twenty fencers represented the United States in 1984.
Men
Women
Field hockey
Summary
Men's tournament
Roster
Mohammed Barakat
Ken Barrett
Rawle Cox
Trevor Fernandez
Scott Gregg
Manzar Iqbal
Michael Kraus
Randy Lipscher
David McMichael
Gary Newton
Michael Newton
Brian Spencer
Morgan Stebbins
Robert Stiles
Andrew Stone
Nigel Traverso
Preliminary round
Group A
9th-12th place classification
11th place match
Women's tournament
Roster
Gwen Cheeseman (gk) Beth Anders Kathleen McGahey Anita Miller Regina Buggy Christine Larson-Mason Beth Beglin Marcella Place Julie Staver Diane Moyer Sheryl Johnson Charlene Morett Karen Shelton Brenda Stauffer Leslie Milne Judy Strong