| Dan Costello | |
| Position: | Outfielder |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | September 9, 1891 |
| Birth Place: | Jessup, Pennsylvania, U.S. |
| Death Place: | Pittsburgh, Pennsylvania, U.S. |
| Debutleague: | MLB |
| Debutdate: | July 2 |
| Debutteam: | New York Yankees |
| Finalleague: | MLB |
| Finaldate: | August 18 |
| Finalteam: | Pittsburgh Pirates |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .243 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 24 |
| Teams: | |
Daniel Francis "Dashing Dan" Costello (September 9, 1891–March 26, 1936) was an American Major League Baseball outfielder. Costello played for the New York Yankees and the Pittsburgh Pirates from to . In 154 career games, he had 85 hits, 24 RBIs and a .243 batting average. He batted left and threw right-handed. Costello was born in Jessup, Pennsylvania, and died in Pittsburgh, Pennsylvania.