Eric Oscar Sigvard Ny (15 October 1909 – 2 September 1945) was a Swedish middle-distance runner. He competed in the 1500 m event at the 1932 and 1936 Summer Olympics and finished in 5th and 11th place, respectively. He had a fourth finish in the 800 m at the 1934 European Championships. Ny died in a sailing accident on 2 September 1945 at 35.