Ivan Massie "Ivy" Olson (October 14, 1885 – September 1, 1965) was an American professional baseball shortstop.

He played fourteen seasons in Major League Baseball (MLB) from 1911 to 1924 for the Cleveland Naps, Cincinnati Reds, and Brooklyn Robins.

In 14 seasons, he played in 1,574 games and had 6,111 at bats, 730 runs, 1,575 hits, 191 doubles, 69 triples, 13 home runs, 446 RBI, 156 stolen bases, 285 walks, .258 batting average, .295 on-base percentage, .318 slugging percentage, 1,943 total bases, and 198 sacrifice hits.

After his playing career ended, he was a coach for the Brooklyn Dodgers and the New York Giants.

This biographical article relating to an American baseball shortstop is a stub.