Beatrice Chepkoech Sitonik (born 6 July 1991) is a Kenyan long-distance runner who specializes in the steeplechase over 3000 meters. She won gold at the 2019 World Championships, silver at the 2018 African Championships, and bronze at the 2023 World Championships. Chepkoech won silver in the 1500m at the 2018 Commonwealth Games and bronze at the 2015 African Games. She holds the world record for the 3000 m steeplechase with a time of 8:44.32 set in Monaco in 2018. With that time, she became the first woman in the event to break the 8:50 and 8:45 barriers.
Chepkoech is a two-time Diamond League champion in the 3000 m steeplechase and a Kenyan national champion.