| Election Name: | 2013 St. Louis mayoral election |
| Flag Image: | Flag of St. Louis, Missouri.svg |
| Previous Election: | 2009 St. Louis mayoral election |
| Previous Year: | 2009 |
| Election Date: | April 2, 2013 |
| Next Election: | 2017 St. Louis mayoral election |
| Next Year: | 2017 |
| Turnout: | 12.08% |
| Candidate1: | Francis Slay |
| Image1: | File:Francis Slay 2015.jpg |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 19,989 |
| Percentage1: | 82.22% |
| Candidate2: | James McNeely |
| Party2: | Green Party of the United States |
| Popular Vote2: | 3,779 |
| Percentage2: | 15.54% |
| Type: | Mayor |
| Ongoing: | No |
| Map Size: | 150px |
| Mayor | |
| Before Election: | Francis Slay |
| Before Party: | Democratic Party (United States) |
| After Election: | Francis Slay |
| After Party: | Democratic Party (United States) |
The 2013 St. Louis mayoral election was held on April 2, 2013 to elect the mayor of St. Louis, Missouri. It saw the reelection of incumbent mayor Francis Slay to a fourth term.
The election was preceded by party primaries on March 5.
Incumbent mayor Francis Slay was challenged for renomination by St. Louis City Board of Aldermen President Lewis E. Reed, as well as by Jimmie Matthews.