Aminatou Seyni (born October 24, 1996) is a Nigerien track and field sprinter. She has the Nigerien national records for the 200 metres and 400 metres. She competed in the women's 100 metres and 200 metres at the 2019 African Games. She reached the semifinals in the women's 100 metres. She finished in 4th place in the final of the women's 200 metres. She competed in the women's 200 metres at the 2019 World Athletics Championships. She could not compete in the women's 400 metres due to the IAAF's new testosterone rule.