Tom Mackintosh (born 30 January 1997) is a New Zealand rower. He is currently a single sculler, and is the reigning world bronze medal holder, a feat achieved in his debut season in the class. Mackintosh also won an Olympic gold medal in the sweep discipline, from his time in the eight at his Olympic debut at the Tokyo 2020 Summer Olympics. Off the water, Mackintosh is also a public speaker and entrepreneur.

Mackintosh was born in 1997 in Wellington, New Zealand. His rowing career did not start until moving to Hastings, where he attended Lindisfarne College and joined the Hawke's Bay Rowing Club. He was motivated to start rowing by listening to his father's stories of representing New Zealand as a rower.

Mackintosh began tertiary education at the University of Canterbury, where he achieved a Bachelor of Commerce degree. Academically, he was a recipient of the Prime Minister's Scholarship in 2016 and 2018. He was also awarded the University of Canterbury Sportsman of the Year in 2018, and alongside fellow oarsmen George Howat, was a member of the University of Canterbury Sports Team of the Year in 2017. This study was balanced with Mackintosh's rowing career.

Subsequently, Mackintosh attended Massey University, where he achieved a Masters of Management extramurally, also while balancing his rowing career. During this time he was named Massey Distance sportsperson of the year for 2020 & 2021. Mackintosh was again a recipient of the Prime Minister's Scholarship in 2019, 2020, and 2021.

He later moved to Oxford University, becoming President of Oxford University Boat Club for 2025.

Mackintosh's first World Championships appearance was the 2014 World Rowing Junior Championships in Hamburg, where he achieved a silver medal in the coxed four. After a break to focus on his university studies, he was selected in the 2016 New Zealand Under 21 Team that competed in a two-regatta series against Australia. He attended the 2017 World Rowing Under 23 Championships in the eight, placing seventh.

Mackintosh returned to the four in 2018, and enjoyed success in the boat across the following three years. At the 2018 World Rowing Under 23 Championships, he achieved a bronze medal as a member of the four, the first of several medals Mackintosh would achieve in a crew with Matt Macdonald. The young under 23 four was sent to the open 2018 World Rowing Championships for experience, placing 15th. Returning to the 2019 World Rowing Under 23 Championships, Mackintosh's crew bettered their previous performance by achieving a silver medal. Mackintosh was again selected in the four for the open World Rowing Championships in 2019, but this time in an open class boat, not the under 23s. The boat placed 14th.

Mackintosh then moved from the four to the eight. The class is not commonly competed in by New Zealand who, prior to the gold Mackintosh achieved at the Tokyo 2020 Summer Olympics, had not medalled in the event for 49 years. The crew's debut outing as an eight was the 2021 World Rowing Final Olympic Qualification Regatta, where they surprised the field to place first in their heat and first in the final. The team then went on to compete at the Tokyo 2020 Summer Olympics (held in 2021 due to Covid19). Although only placing second in their heat behind a fast Dutch crew, the crew placed first in the repechage showing good speed in choppy tailwind conditions. In the final, having rediscovered their rhythm famously termed "Big Boy Rhythm" by the team, the crew rowed through the field after a strong second 500m, and decisive third 500m to win gold. Mackintosh sat in the bow seat of the eight, behind Hamish Bond who was winning his third Olympic Gold following wins in the men's pair at London 2012 and Rio 2016.