Myrtle McAteer (June 12, 1878 – October 26, 1952) was an American tennis player around the turn of the 20th century. At the U.S. National Championships (now known as the U.S. Open), McAteer won the singles title in 1900, and doubles titles in 1899 and 1901. She also was a singles finalist in 1901, a doubles finalist in 1900, and a mixed doubles finalist in 1901. At the U.S. Clay Court Championships in 1915, she was a singles quarterfinalist and a mixed doubles semifinalist. She died in Los Angeles, California in 1952.