Jessica Tatiana Long (born February 29, 1992) is a Russian-born United States Paralympic swimmer from Baltimore, Maryland competing in S8 and SB7 category events. She has held world records in several events in her class and has won multiple gold medals over three Summer Paralympics. Long entered the international stage at the 2004 Paralympic Games in Athens, Greece, winning three gold medals in swimming. Aged twelve at the time, she was the youngest competitor on the U.S. Paralympic Team. One of her gold medals was the 100-meter freestyle.
Long was born Tatiana Olegovna Kirillova in Bratsk, Siberia and adopted at the age of 13 months. Because of fibular hemimelia, her lower legs were amputated when she was 18 months old. She learned to walk with prostheses. Long has been involved in many sports including gymnastics, cheerleading, ice skating, biking, trampoline, and rock climbing. She began swimming in her grandparents' pool before joining her first competitive team in 2002. The next year, Long was selected as Maryland Swimming's 2003 Female Swimmer of the Year with a Disability.