Frank Thompson (born Augustus Fernandez; February 1852 – October 30, 1925) was a Portuguese professional baseball player in the United States.

Thompson played in 11 games with the 1875 Washington Nationals as a catcher (also playing part of one game in the outfield), during which he had a batting average of .098 and committed 32 errors and 25 passed balls.

[1][2] In his lone game with the 1875 Brooklyn Atlantics, Thompson recorded two hits, a run scored, and a run batted in, but made two errors in two chances while playing right field.

[1][3] Thompson was born as Augustus Fernandez in Madeira, Portugal.

While David Nemec identifies this player as the Andrew Thompson who managed the St. Paul Saints of the Union Association in 1884,[3] Paul Batesel states that they were two different people.