Joanna Dove Hayes (born December 23, 1976, Williamsport, Pennsylvania) is an American hurdler, who won the gold medal in the 100 metres hurdles at the 2004 Summer Olympics.

She finished fourth at the 2004 World Indoor Championships, and in August she won the Olympic gold medal in a career best time of 12.37 seconds.

She did reach the final race, only to fail to finish after stumbling in the hurdles.

While in high school at John W. North High School in Riverside, California she won both the 100 meter hurdles (setting the meet record) and 300 meter hurdles at the CIF California State Meet in 1995 and was named the national Girl's "High School Athlete of the Year" by Track and Field News.

She was the former personal coach (2018-2020) to professional runner and 400m hurdle world recorder holder Sydney McLaughlin.