Winners

Dick Wilmarth won the first race in the year 1973, in 20 days, 0 hours, 49 minutes, and 41 seconds. The fastest winning time is Martin Buser's 2002 finish, in 8 days, 22 hours, 46 minutes, and 2 seconds. The closest finish was the 1978 victory by Dick Mackey. The win is controversial, because while the nose of his lead dog crossed the finish line one second ahead of Rick Swenson's lead dog, Swenson's body crossed the finish line first.

The first musher to win four races was Rick Swenson, in 1982. In 1991 he became the only person to win five times, and the only musher to win the race in three different decades. Susan Butcher, Doug Swingley, Martin Buser and Jeff King are the only other four-time winners.

Mary Shields was the first woman to complete the race, in 1974. In 1985 Libby Riddles was the only musher to brave a blizzard, becoming the first woman to win the race. She was featured in Vogue, and named the Professional Sportswoman of the Year by the Women's Sports Foundation. Susan Butcher withdrew from the same race after two of her dogs were killed by a moose, but became the second woman to win the race the next year, and subsequently won three of the next four races. Butcher was the second musher to win four races, and the only musher to finish in either first or second place for five straight years.

Doug Swingley of Montana was the first non-Alaskan to win the race, in 1995. Mushers from 14 countries have competed in the Iditarod races, and in 1992 Martin Buser—Swiss, but a resident of Alaska since 1979—was the first foreigner to win the race. Buser became a naturalized U.S. citizen in a ceremony under the Burled Arch in Nome following the 2002 race. The Norwegian Robert Sørlie was the first foreigner not resident in the United States to win the race in 2003.

Lance Mackey won both the Yukon Quest and Iditarod in the same year (in 2007), the first to do so. Mackey also joined his father and brother, Dick and Rick Mackey as an Iditarod champion. All three Mackeys raced with the bib number 13, and coincidentally all won their respective titles on their sixth try.

The "Golden Harness" is given to the lead dog or dogs of the winning team. The "Rookie of the Year" award is given to the musher who places the best among those finishing their first Iditarod. A red lantern signifying perseverance is awarded to the last musher to cross the finish line. The size of the purse determines how many mushers receive cash prizes. The first place winner also receives a new pickup truck.