ONCE A TROJAN, ALWAYS A TROJAN

USC Athletics

Trojan Athletic Achievement

See also: List of NCAA schools with the most Division I national championships

The Trojans have won 122 team national championships, 100 of which are NCAA National Championships. This is the third highest count of all universities behind Stanford with 105, and UCLA with 111. Best if consider how many sports teams USC fields in comparison to other schools.
The Trojan men have won 97 national championships (84 NCAA titles), more than any other University
The Women of Troy have earned 25 national championships (16 NCAA titles), third in the nation.
The Trojans won at least 1 national team title in 26 consecutive years (1959–60 to 1984–85).
USC won the National College All-Sports Championship an annual ranking by USA Today of the country’s top athletic programs — 6 times since its inception in 1971.
Trojan men athletes have won more individual NCAA titles (302) than those from any other school in the nation and the Women of Troy have brought home another 55 individual NCAA crowns for a combined 357 individual NCAA championships.
Four Trojans have won the prestigious James E. Sullivan Award as the top amateur athlete in America: diver Sammy Lee (1953), shot putter Parry O’Brien (1959), swimmer John Naber (1977) and swimmer Janet Evans (1989).
Two Trojans have won the Honda-Broderick Cup as the top collegiate woman athlete of the year: Cheryl Miller (1983–84) and Angela Williams (2001–02). And Trojan women have won 8 Honda Awards, as the top female athlete in their sport.

USC has a reputation and long tradition of nurturing Olympic athletes. From the 1904 Summer Olympics through the 2014 winter games, 422 Trojan athletes have competed in the Games, taking home 135 gold medals (with at least 1 gold in every summer Olympics since 1912), 88 silver and 65 bronze.
There have been more Trojans in the Olympics than from any other university in the world – if USC were its own nation in the Olympics, it would rank tied for 8th in the world in total gold medals earned, but only if you count each USC gold-medal winner individually and each country's team medals as a single medal. For instance, USC's three women's water polo 2012 gold medalists count as 3 medals by this method, whereas silver medalist Spain only counts one medal.
While a student, Rebecca Soni won an Olympic gold medal for swimming the 200m breaststroke during the 2008 Beijing Olympics, setting a world record. She also received a silver medal in the 100m breaststroke and the 4x100m Medley Relay.

2004 AP National Championship Trophy.

Football (11) - 1928, 1931, 1932, 1939, 1962, 1967, 1972, 1974, 1978, 2003, 2004
Baseball (12) - 1948, 1958, 1961, 1963, 1968, 1970, 1971, 1972, 1973, 1974, 1978, 1998
Gymnastics (1) - 1962
Swimming & Diving (9) - 1960, 1963, 1964, 1965, 1966, 1974, 1975, 1976, 1977
Tennis (21) - 1946, 1951, 1955, 1958, 1962, 1963, 1964, 1966, 1967, 1968, 1969, 1976, 1991, 1993, 1994, 2002, 2009, 2010, 2011, 2012, 2014
Track & Field (26) - 1926, 1930, 1931, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1958, 1961, 1963, 1965, 1967, 1968, 1976
Indoor Track & Field (2) - 1967, 1972
Volleyball (6) - 1949*, 1950*, 1977, 1980, 1988, 1990
Water Polo (9) - 1998, 2003, 2005, 2008, 2009, 2010, 2011, 2012, 2013

97 (84 NCAA) Total Men's Titles

* Indicates non-NCAA championship (not including football titles, which are all non-NCAA)

25 (16 NCAA) Total Women's Titles

* indicates non-NCAA championship