| John M. McKeon | |
| State Senate: | Missouri |
| District: | 32nd |
| Term Start: | elected 1938 |
| Term End: | died 1939 |
| Succeeded: | Clinton Watson |
| Birth Date: | October 29, 1882 |
| Birth Place: | St. Louis, Missouri |
| Death Date: | March 18, 1939 |
| Death Place: | St. Louis, Missouri |
| Nationality: | American |
| Spouse: | Anna Burns |
| Party: | Democrat |
| Children: | 1 daughter |
| Occupation: | politician, insurance broker, railroad |
John M. McKeon (October 29, 1882 - March 18, 1939) was an American politician from St. Louis, Missouri, who served in the Missouri Senate.[1]