| Johnny Johnston | |
| Position: | Left fielder |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | 28 March 1890 |
| Birth Place: | Longview, Texas, U.S. |
| Death Place: | San Diego, California, U.S. |
| Debutleague: | MLB |
| Debutdate: | April 10 |
| Debutteam: | St. Louis Browns |
| Finalleague: | MLB |
| Finaldate: | September 4 |
| Finalteam: | St. Louis Browns |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .224 |
| Stat2label: | Home runs |
| Stat2value: | 2 |
| Stat3label: | Runs batted in |
| Stat3value: | 27 |
| Teams: | |
John Thomas Johnston (March 28, 1890 – March 7, 1940) was an American Major League Baseball left fielder who played with the St. Louis Browns in .