Tom Elmer (born 1 April 1997) is a Swiss middle-distance runner who competes for On.[1] He competed in the 1500 metres at the 2023 World Athletics Championships, reaching the semi-finals.[2] Between 2019 and 2023, Elmer became the Swiss national champion in the 1500 meters run outdoors every year and indoors in 2020, 2022 and 2023.[3] In 2022 he also won the 3000 metres at the indoor championships.