| Election Name: | 2009 Cincinnati mayoral election |
| Flag Image: | Flag of Cincinnati, Ohio.svg |
| Country: | Cincinnati |
| Type: | Mayoral |
| Ongoing: | no |
| Previous Election: | 2005 Cincinnati mayoral election |
| Previous Year: | 2005 |
| Next Election: | 2013 Cincinnati mayoral election |
| Next Year: | 2013 |
| Election Date: | November 3, 2009 |
| Image1: | File:Mark Mallory.jpg |
| Candidate1: | Mark Mallory |
| Party1: | Nonpartisan candidate |
| Popular Vote1: | 38,645 |
| Percentage1: | 54.34% |
| Candidate2: | Brad Wenstrup |
| Party2: | Nonpartisan candidate |
| Popular Vote2: | 32,424 |
| Percentage2: | 45.59% |
| Mayor | |
| Before Election: | Mark Mallory |
| Before Party: | Democratic Party (United States) |
| After Election: | Mark Mallory |
| After Party: | Democratic Party (United States) |
The 2009 Cincinnati mayoral election took place on November 3, 2009, to elect the Mayor of Cincinnati, Ohio. Usually a nonpartisan primary is held where the top two candidates move on to the general election, however, incumbent mayor Mark Mallory and Brad Wenstrup were the only two candidates to file, so no primary election was held.
While the election was nonpartisan, Mallory was a known Democrat and Wenstrup was a known Republican.