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Maggie Mac Neil

Maggie Mac Neil is a Canadian former competitive swimmer best known for winning Olympic gold in the 100-metre butterfly at Tokyo 2020.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Maggie Mac Neil is a Canadian former competitive swimmer best known for winning Olympic gold in the 100-metre butterfly at Tokyo 2020. She is one of Canada’s most decorated swimmers, with world, Commonwealth, Pan American, and Olympic titles, and she announced her retirement from competitive swimming in 2024.

Early life

Maggie Mac Neil was born in Jiujiang, Jiangxi, China on 26 February 2000, and was adopted by a Canadian family a year later. She grew up in London, Ontario, and later competed for Michigan and LSU at the collegiate level.

International swimming career

Mac Neil emerged as an elite butterfly swimmer in 2019 when she won the World Aquatics Championships title in the 100-metre butterfly. She followed that with Olympic gold in 2021 at the Tokyo Games, then added world, Commonwealth, and Pan American titles over the next several seasons.

Tokyo 2020 and later achievements

At the Tokyo 2020 Olympics, Mac Neil won gold in the women's 100-metre butterfly, silver in the 4x100-metre freestyle relay, and bronze in the 4x100-metre medley relay. She later won five gold medals at the 2023 Pan American Games, setting a Canadian record for most gold medals by one athlete at a single Pan American Games.

Retirement

Mac Neil announced her retirement from competitive swimming in September 2024 after the Paris Olympics cycle. Reports indicated she planned to focus on law school after leaving elite competition.

Key facts

  • Olympic champion in the women's 100 metre butterfly at Tokyo 2020.
  • Won three medals at the Tokyo 2020 Olympics: one gold, one silver, and one bronze.
  • Won the 2019 World Aquatics Championships title in the 100 metre butterfly.
  • Won the 2023 Pan American Games title and set a Canadian record for gold medals won by one athlete at a single Pan Ams.
  • Announced her retirement from competitive swimming in September 2024.
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Canadian context

Mac Neil is a prominent Canadian Olympian from London, Ontario, and her results include Olympic, Commonwealth, Pan American, and world titles for Canada.

Frequently asked questions

Who is Maggie Mac Neil?
Maggie Mac Neil is a Canadian former competitive swimmer and Olympic champion known for the 100 metre butterfly.
How old is Maggie Mac Neil?
She was born on 26 February 2000, making her 26 years old as of 2026.
What happened to Maggie Mac Neil?
She retired from competitive swimming in September 2024 after a decorated international career.
Maggie Mac Neil Olympics
At the Tokyo 2020 Olympics, she won gold in the 100 metre butterfly, silver in the 4x100 metre freestyle relay, and bronze in the 4x100 metre medley relay.
Maggie Mac Neil gold medal
Her Olympic gold medal came in the women's 100 metre butterfly at Tokyo 2020.
Maggie Mac Neil injury
The provided sources do not report a specific injury as the reason for her retirement or career changes.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Maggie_Mac_Neil
    Supports: Full name, birth date, nationality, event specialism, major titles, retirement announcement
  2. Olympic.cahttps://olympic.ca/team-canada/margaret-mac-neil/
    Supports: Olympic results, 100m butterfly gold, relay medals, Canadian representation
  3. Olympics.comhttps://olympics.com/en/athletes/margaret-macneil
    Supports: Biography, adoption, major international achievements, world records, 2023 Pan Ams
  4. Olympediahttps://www.olympedia.org/athletes/141454
    Supports: Full name, birth date, birthplace, Olympic participation
  5. CBChttps://www.cbc.ca/radio/thenextchapter/thriller-writer-samantha-m-bailey-sleuthed-out-olympian-maggie-mac-neil-as-her-canada-reads-champion-1.7453312
    Supports: Canadian swimmer, Tokyo medal count, retirement and law school plans