| Election Name: | 2012 Miami-Dade County mayoral election |
| Flag Image: | Flag of Miami-Dade County, Florida.svg |
| Country: | Miami-Dade County |
| Type: | Mayoral |
| Ongoing: | no |
| Previous Election: | 2011 Miami-Dade County mayoral special election |
| Previous Year: | 2011 (special) |
| Next Election: | 2016 Miami-Dade County mayoral election |
| Next Year: | 2016 |
| Election Date: | August 14, 2012 |
| Image1: | Carlos A. Gimenez.jpg |
| Candidate1: | Carlos A. Giménez |
| Color1: | C0C0C0 |
| Popular Vote1: | 126,525 |
| Percentage1: | 54.2% |
| Candidate2: | Joe Martinez |
| Color2: | C0C0C0 |
| Popular Vote2: | 71,814 |
| Percentage2: | 30.8% |
| Image3: | 3x4.svg |
| Candidate3: | Helen B. Williams |
| Color3: | C0C0C0 |
| Popular Vote3: | 14,754 |
| Percentage3: | 6.3% |
| Mayor | |
| Before Election: | Carlos A. Giménez |
| Before Party: | Republican Party (United States) |
| After Election: | Carlos A. Giménez |
| After Party: | Republican Party (United States) |
| Turnout: | 20.0% |
The 2012 Miami-Dade County mayoral election took place on August 14, 2012. Incumbent Mayor Carlos A. Giménez defeated County Commissioner Joe Martinez with over 50% of the vote, avoiding a November 6 runoff.[1] The election was officially nonpartisan.