| Flag Image: | Flag of San Juan, Puerto Rico.svg |
| Country: | Puerto Rico |
| Type: | presidential |
| Previous Election: | 2000 San Juan, Puerto Rico, mayoral election |
| Previous Year: | 2000 |
| Next Election: | 2008 San Juan, Puerto Rico, mayoral election |
| Next Year: | 2008 |
| Election Date: | November 2, 2004 |
| Nominee1: | Jorge Santini |
| Party1: | New Progressive Party (Puerto Rico) |
| Popular Vote1: | 97,121 |
| Percentage1: | 100% |
| Mayor | |
| Before Election: | Jorge Santini |
| Before Party: | New Progressive Party (Puerto Rico) |
| After Election: | Jorge Santini |
| After Party: | New Progressive Party (Puerto Rico) |
San Juan, Puerto Rico, held an election for mayor on November 2, 2004. It was held as part of the 2004 Puerto Rican general election. It saw the reelection incumbent mayor Jorge Santini, a member of the New Progressive Party. Santini ran unchallenged.