Margaret Ann Steffens (born June 4, 1993) is an American professional water polo player.

[4][5] Steffens played water polo at Monte Vista High School and helped the team win their league championship in 2007, 2008, and 2009.

[8] Steffens attended Stanford University, playing on the women's water polo team from 2013 to 2017.

[13] Her first international appearance was at the 2009 FINA Junior Women's World Championships in Khanty-Mansiysk, Russia, finishing in third place.

[14] Steffens also made her senior debut at the age of 16, at the 10th Holiday Cup in Newport Beach, California, from December 9 to 13, 2009, where she scored twice.

In the Pan American Games, she scored the winning goal in the shootout of the final match, as the U.S. defeated Canada.

[6] The U.S. won the FINA World League Super Final for the third straight year in 2012, and Steffens led the team with 11 goals.

[22][23] In the second match of the tournament against team China, Steffens scored once and left the pool twice to receive medical attention after being cut on her nose.

She became interested and was influenced in the sport of water polo mainly by her father and sister, Jessica Steffens, who is also on the United States national team.

[42] She said her goal in working with the company was to increase the awareness of the number of female role models in sports.