Earl Stuart Blackburn (November 1, 1892 – August 3, 1966) was a right-handed catcher in Major League Baseball for the Pittsburgh Pirates, Cincinnati Reds, Boston Braves, and Chicago Cubs from 1912 to 1917.

Blackburn made his debut with the Pirates on September 17, 1912, appearing in the field but not coming to bat.

He appeared in 17 more games with Cincinnati in 1913, going 7 for 27 at the plate with three RBI, before being relegated to the minors again.

Finally in 1916, Blackburn saw substantial major league playing time, hitting .273 in 47 games with the Braves as a backup to Hank Gowdy.

Boston traded Blackburn to the Chicago Cubs in January 1917.