| Flag Image: | Flag of San Juan, Puerto Rico.svg |
| Country: | Puerto Rico |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2008 San Juan, Puerto Rico, mayoral election |
| Previous Year: | 2008 |
| Next Election: | 2016 San Juan, Puerto Rico, mayoral election |
| Next Year: | 2016 |
| Election Date: | November 6, 2012 |
| Image1: | Carmenyulin (1).jpg |
| Nominee1: | Carmen Yulín Cruz |
| Party1: | Popular Democratic Party (Puerto Rico) |
| Popular Vote1: | 87,313 |
| Percentage1: | 50.54% |
| Nominee2: | Jorge Santini |
| Party2: | New Progressive Party (Puerto Rico) |
| Popular Vote2: | 81,005 |
| Percentage2: | 46.89% |
| Mayor | |
| Before Election: | Jorge Santini |
| Before Party: | New Progressive Party (Puerto Rico) |
| After Election: | Carmen Yulín Cruz |
| After Party: | Popular Democratic Party (Puerto Rico) |
San Juan, Puerto Rico, held an election for mayor on November 6, 2012. Among other elections, it was held concurrently with the 2012 Puerto Rico gubernatorial election. It saw the election of Popular Democracy Party nominee Carmen Yulín Cruz ho unseated incumbent New Progressive Party mayor Jorge Santini.