| Flag Image: | Flag of San Juan, Puerto Rico.svg |
| Country: | Puerto Rico |
| Type: | presidential |
| Previous Election: | 1980 San Juan, Puerto Rico, mayoral election |
| Previous Year: | 1980 |
| Next Election: | 1988 San Juan, Puerto Rico, mayoral election |
| Next Year: | 1988 |
| Election Date: | November 6, 1984 |
| Nominee1: | Baltasar Corrada del Río |
| Party1: | New Progressive Party (Puerto Rico) |
| Alliance1: | Democratic |
| Popular Vote1: | 105,118 |
| Percentage1: | 48.35% |
| Nominee2: | Victoria Muñoz Mendoza |
| Party2: | Popular Democratic Party (Puerto Rico) |
| Alliance2: | Democratic |
| Popular Vote2: | 96,857 |
| Percentage2: | 44.55% |
| Mayor | |
| Before Election: | Hernán Padilla |
| Before Party: | New Progressive Party (Puerto Rico) |
| After Election: | Baltasar Corrada del Río |
| After Party: | New Progressive Party (Puerto Rico) |
San Juan, Puerto Rico, held an election for mayor on November 6, 1984. It was held as part of the 1984 Puerto Rican general election. It saw the election of Baltasar Corrada del Río, a member of the New Progressive Party.