Alexander Magleby (born February 19, 1978) is the Co founder and Executive Chairman of the professional rugby union team, The New England Free Jacks. He is a former professional rugby union coach, and former United States national team player and captain.

Magleby played for high school rugby coach Larry Gelwix at Highland High School from 1993 to 1996. The movie Forever Strong (2008) was inspired by coach Gelwix and his team's history, particularly during the mid-1990s era. Magleby helped the team win national championships in 1994, 1995, and 1996, and was the team's Most Valuable Player (Forward) his senior season. Magleby was the first Highland Rugby alumnus to play both 15s and 7s for US Eagles national team.

While at Highland High School Magleby served as Student-Body President, was co-captain of the American football team, and was Valedictorian.

A Dartmouth College alumnus, Magleby was captain his senior year (1999–2000). He started at flanker all four years helping lead the Big Green to Ivy League Championships in 1998, 1999, and 2000 under long-term Dartmouth Rugby head coach, Wayne Young.

Magleby was selected to the US national rugby sevens team his senior year of Dartmouth College, subsequently starting at hooker from 2000 to 2005, and captaining the Eagles to the 2005 Rugby World Cup Sevens. He also appeared for the US Eagles 15s on eight occasions garnering four test match caps from 2000 to 2001.

While playing for the United States, Magleby served on the USA Rugby Board of Directors Executive Committee as the international athlete representative.

A Dartmouth College alumnus, and former Dartmouth Rugby captain, he coached his alma-mater and the Ivy League powerhouse from 2001 to 2012, leading the program to eight Ivy League Championships in that time and a five-year Ivy Rugby undefeated record. Under his tutelage the Dartmouth's Sevens team won the USA Sevens national Collegiate Rugby Championship in 2011 and 2012.

Magleby was the head coach of the US national rugby sevens team for the last portion of the 2012 IRB Sevens World Series, the 2013 IRB Sevens World Series, and the 2013 IRB Rugby World Cup Sevens in Moscow. He took over for former coach Al Caravelli in March 2012 as the first ever full-time daily training environment and residency program was established for men and women USA Rugby sevens players in Chula Vista, CA. Magleby announced his retirement in June 2013 to return to his consulting business. He soon thereafter became the Technical Advisor to Dartmouth Rugby.