Marybeth Linzmeier Dorst (born July 24, 1963), née Marybeth Linzmeier, is an American former competition swimmer who represented the United States at the Pan American Games and the World University Games in the early 1980s.

Linzmeier was a star swimmer at Mission Viejo High School in Mission Viejo, California and qualified for the 1980 Summer Olympics in Moscow in several swimming events.

[2] Linzmeier missed qualifying for the 1984 U.S. Olympics team by three one-hundredths (0.03) of a second.

[1] Linzmeier Dorst is a real estate agent in the San Francisco Bay Area.

[3] She and her husband, Christopher Dorst, a silver medalist as a member of the 1984 U.S. Olympic water polo team, have three daughters.