Nancy Merki (June 1, 1926 – October 7, 2014), also known by her married names Lees, Cory and Boland, was an American competition swimmer who represented the United States at the 1948 Summer Olympics in London.
Despite contracting polio at a young age, she set numerous amateur swimming records in her career, most in her early teens, and went on to compete in the 400-meter freestyle in the Olympics.