The following is a list of 1977 Seattle Mariners draft picks. The list includes the June regular draft (Rule 4 draft), the June secondary draft, and the January regular draft, and January secondary draft. In all the drafts, the Mariners selected 17 pitchers, 13 outfielders, 4 catchers, 4 shortstops, 3 first baseman, 2 third basemen, 1 second baseman, 1 middle infielder for a combined total of 45 players in all drafts. Six selections by the Seattle Mariners in 1977 went on to play in Major League Baseball.
