Mary Teresa Slaney is an American retired middle-distance runner. During her career, she won gold medals in the 1500 meters and 3000 meters at the 1983 World Championships and was the world-record holder in the mile, 5000 meters and 10,000 meters. In total, she set 17 official and unofficial world records, and she was the first woman to break 4:20 for the mile. She also set 36 U.S. national records at distances ranging from 800 meters to 10,000 meters, and has held the U.S. record in the 2000 meters and 3000 meters since the early 1980s, while her 1500 meters record stood for 32 years and her mile record stood for 38 years. In 2003, she was inducted into the National Track and Field Hall of Fame.

These are the official results of the Women's 3000 metres event at the 1984 Summer Olympics in Los Angeles, California. The final, held on August 10, 1984, was won by Maricica Puică of Romania. This was the first ever 3000 meters race for women at the Olympics. The race is still remembered because of the fall of world champion Mary Decker after a collision with Zola Budd.