Priscilla June Welch (born 22 November 1944 in Bedford, England) is a British retired marathonrunner. She had a most unlikely career in international athletics, having been a smoker of a pack a day until she began running competitively at age 35. An officer in the British Army, Welch met her husband Dave while serving in Norway. She quit smoking, and under his tutelage, she ran in the 1980 London Marathon at age 35.
Four years later, she qualified for the British Olympic team at the 1984 Summer Olympics in Los Angeles. In the first women's Olympic marathon, Welch finished sixth, remarkable for someone who was nearly 40 years old. On her 40th birthday, Welsh qualified for the masters division and began setting age group world records.
In 1987, she won the New York Marathon with a 2:30:17. This was coupled with her second place finish in London where she set an age group world record running a 2:26:51, good for the sixth fastest time in the world for 1987. She was criticised for passing up the chance to win a medal at the World Championships in Rome that year. Welch set the age group world record in Boston by running a 2:30:48 in 1988. This record stood for 14 years.