Akilles "Aki" Eero Johannes Järvinen (19 September 1905 – 7 March 1943) was a Finnish decathlete. He competed at the 1928, 1932 and 1936 Olympics and won two silver medals, in 1928 and 1932; he served as the Finnish flag bearer at all three games. He also won a European silver medal in the 400 m hurdles in 1934. Järvinen was one of Finland's most versatile athletes of his era. At the national level, his decathlon records are still competitive, and if the current decathlon points tables had been used, Järvinen would have won the gold medal at the 1928 and 1932 Olympics.