Madison Ann Dagen was born on December 27, 1999 in Pleasanton, CA to Shawn and Paige Dagen. Madison has an older sister, Lacy who is a gymnast at the University of Oregon. Currently, Madison is a senior at Foothill High School and she will graduate from high school in 2018.

Madison wanted to be like her older sister, so she started taking recreational classes for fun at the age of two and quickly progressed in the sport. She started her competitive gymnastics career at Pacific West Gymnastics where she trained under coaches Maria Traggioand Liviu Mazilu until the summer of 2011.

As a level 4 gymnast in 2006, Madison finished first on floor exercise and second on balance beam at the NorCal State Championships. In 2007, she placed second in the all-around and first on uneven bars and floor exercise at the Level 6 NorCal State Championships. As a level 6 gymnast in 2008, Madison placed fourth in the all-around and first on floor exercise at the NorCal State Championships.

Madison moved up to level 7 for the 2009 season. At the NorCal State Championships, Madison placed first on balance beam, floor exercise and in the all-around. In 2011 as a level 8 gymnast, she finished second on uneven bars and third on vault, floor exercise and in the all-around at the NorCal State Championships. She qualified to the Region 1 Championships where she placed tenth in the all-around, second on floor exercise and fourth on balance beam. In the summer of 2011, Madison started training at San Mateo Gymnastics in Belmont, CA.

As a level 9 gymnast in 2012, Madison placed seventh in the all-around, third on uneven bars and fourth on floor exercise at the NorCal State Championships. She had a great meet at the Region 1 Championships where she finished third in the all-around with a 38.000, third on vault and fifth on uneven bars and floor exercise. Madison qualified to the Level 9 Western Nationals and finished fourth in the all-around, fourth on floor exercise and fifth on uneven bars. Madison continued competing level 9 for the 2013 season. She had a great meet at the NorCal State Championships, finishing first on balance beam, floor exercise and in the all-around with a 38.450. At the Region 1 Championships, she finished seventh in the all-around, fourth on vault and fifth on floor exercise, qualifying to the Level 9 Western Nationals. At the Westerns, Madison placed second in the all-around with a 38.400, second on balance beam and third on vault and uneven bars.

As a first-year level 10 gymnast in 2014, Madison placed first on vault, balance beam and in the all-around at the Lady Luck Invitational and qualified to the Nastia Liukin Supergirl Cup. In March, Madison competed at the Nastia Liukin Supergirl Cup in Greensboro, NC where she competed against some top junior gymnasts in the United States. She placed eighth in the all-around with a 37.450 as well as seventh on vault and floor exercise. A few weeks later, she competed at the NorCal State Championships and placed first on floor exercise and in the all-around with a 37.875. At the Region 1 Championships, she placed sixth in the all-around, third on vault and fourth on floor exercise. This qualified Madison to the Junior Olympic Nationals in Jackson, MS where she placed ninth in the all-around, fourth on vault and ninth on uneven bars out of 56 gymnasts.

In 2015, Madison placed third in the all-around, second on vault and third on uneven bars at the NorCal State Championships. She finished second in the all-around, first on uneven bars and third on vault at the Region 1 Championships and qualified to the Junior Olympic Nationals in Des Moines, IA. At the Nationals, she placed seventh on vault. In 2016, Madison finished second in the all-around with a 38.350 and first on balance beam at the NorCal State Championships. She had a great meet at the Region 1 Championships, finishing first in the all-around with a 38.750 as well as first on vault, balance beam and floor exercise. She qualified to the Junior Olympic Nationals in Ft. Worth, TX and placed in the top ten in the all-around with a 37.725. She also placed second on balance beam, 10th on vault and 13th on floor exercise.

Madison had a great 2017 season. She won the all-around title with a 38.750 and placed first on vault and floor exercise at the State Championships. At the Region 1 Championships, she placed third in the all-around with a 38.650 and second on vault and balance beam. Madison qualified to the Junior Olympic Nationals in Indianapolis, IN, finishing third in the all-around with a 38.450, fourth on vault, fifth on balance beam and seventh on floor exercise. She made the JO National Team.

Currently, Madison is preparing for the 2018 season as a level 10 gymnast. She trains 27 hours per week at San Mateo Gymnastics under coaches Armen Astoain and Oksana Bystrova. Madison verbally committed to Oregon State University for the 2018-2019 school year.