Hayden Wilde (born 1 September 1997) is a New Zealand professional triathlete. He was the silver medalist at the Paris Olympics in 2024 and the bronze medallist at the Tokyo Summer Olympics, the silver medalist at the 2022 Commonwealth Games and the winner of the 2021 XTERRA World Championships. He finished second in the 2021 Super League Triathlon Championship Series, having taken the win at the SLT London race. Wilde won the 2022 Super League Triathlon Championship Series, having been victorious in 3 of the 5 series races. In December 2025 Wilde became T100 World Champion following his first place finish at T100 Qatar 2025.

Wilde was born in Taupō, is the youngest of three brothers, and grew up in Whakatāne, New Zealand. Wilde attended Trident High School. Growing up Wilde played soccer and hockey before moving into running for fitness.

Wilde has been coached by Craig Kirkwood since 2016 after he beat Kirkwood in a local half marathon and currently trains in Tauranga, New Zealand. Wilde only took up triathlon after watching the event at the 2016 Rio Olympics.

Wilde comes from a long-distance off-road background and has previously been the ITU Cross Tri U23 World Champion.

Career Highlights include:

Wilde finished the season in 11th place in the ITU World Triathlon Series rankings, with 2019 being the first year he appeared in the top 50.

Wilde finished fifth on the World Cup circuit in Leeds and third at the Europe Triathlon Championships in Austria. Wilde won the Super League Triathlon London race, ahead of France's Vincent Luis and British Athlete Jonny Brownlee. He went on to finish the 2021 Super League Triathlon Championship Series in 2nd, behind Britain's Alex Yee.

Wilde won the Arena Games Triathlon 2022 Series finale, held at Marina Bay, Singapore. It was his debut racing at Arena Games Triathlon format. This result was also good enough to see Wilde finish fifth in the inaugural Esport Triathlon World Championship.