Mary Gail Sullivan (born 6 January 1962) is a former American rugby union player.

She captained the United States at the inaugural 1991 Women's Rugby World Cup held in Wales.

[1][2] Sullivan made her Eagles debut on November 14, 1987 against Canada at Victoria, British Columbia.

She graduated from the Muscular Therapy Institute in Cambridge, Massachusetts in 1993 and taught there for fifteen years.

[7] In 2017 Sullivan and the 1991 World Cup squad were inducted into the United States Rugby Hall of Fame.