Einar Nilsson (8 June 1891 – 22 February 1937) was a Swedish track and field athlete who competed in the 1912 and 1920 Summer Olympics.^[3] In 1912 he entered the pentathlon, decathlon and two varieties of shot put and discus throw. He failed to complete his decathlon program, but placed fourth-tenth in the throwing events. In 1920 he qualified only in the shot put and finished fifth.^[1][4]

Nilsson held national records in the shot put and discus throw, becoming the first Swede to break the 40 m barrier. He won five national titles in the shot put (1911–1914) and two in the discus (1911 and 1912), and placed second six times.^[4][5]

Nilsson represented Djurgårdens IF and Örgryte IS.^[3]