Kanyinsola Ajayi (born 14 September 2004) is a Nigerian sprinter. He is the African record holder over 60 metres and became Nigerian national champion in the 100 metres in 2024. Competing in the United States he won the 2026 NCAA Indoor Championships over 60 metres.
From Ikorodu, he won both sprints at the 2021 Maltina School Games and set a personal best of 10.26 seconds for the 100 metres at the second AFN All-Comers meet at Yabatech Sports Center in 2022. He competed at the 2022 World Athletics U20 Championships in Cali, Colombia.
He won a gold medal in the 100 metres at the 2023 African Athletics U20 Championships in Ndola, Zambia. At that championships he also won a gold medal in the relay.
He became Nigerian national champion in the 100 metres in June 2024. He finished fourth in the 100 metres at the African Championships in Douala, Cameroon that month. At that championships, he won a silver medal in the relay.
He competed in the 100 metres at the 2024 Paris Olympics, where he reached the semi-finals. He also competed in the men's relay at the Games.
He lowered his 60 metres personal best to 6.48 seconds at the 2025 NCAA Indoor Championships. He ran 6.52 seconds to finish second in the menâÂÂs 60m final on 15 March 2025, in Virginia Beach.
In September 2025, he was a finalist in the 100 metres at the 2025 World Championships in Tokyo, Japan, lowering his personal best to 9.88 seconds and placing sixth in the final in 10.00 seconds.
In February 2026, Ajayi tied Christian Coleman's collegiate record for the 60 metres, running 6.45 seconds to win the SEC Indoor Championships ahead of Jelani Watkins. On 14 March, he ran 6.45 seconds again to equal his African record and win the 2026 NCAA Indoor Championships in Fayetteville ahead of Jelani Watkins.
He attends Auburn University in the United States.