Hayley McGregory (born January 13, 1986) is an English-born American competition swimmer.

McGregory was born to British parents in London, but her family relocated to Houston, Texas when she was a young child.

However, she became weary of competitive collegiate swimming and dropped out of college to turn professional.

McGregory briefly trained at the North Baltimore Aquatic Club with coach Bob Bowman in early 2009.

In the semifinals later that day, McGregory swam a faster time than Natalie and was the top qualifier going into the finals.