| Election Name: | 2005 Seattle mayoral election |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 2001 Seattle mayoral election |
| Previous Year: | 2001 |
| Next Election: | 2009 Seattle mayoral election |
| Next Year: | 2009 |
| Candidate1: | Greg Nickels |
| Party1: | Nonpartisan candidate |
| Popular Vote1: | 115,257 |
| Percentage1: | 64.15% |
| Candidate2: | Al Runte |
| Party2: | Nonpartisan candidate |
| Popular Vote2: | 62,591 |
| Percentage2: | 34.84% |
| Mayor | |
| Before Election: | Greg Nickels |
| After Election: | Greg Nickels |
| Turnout: | 51.36% |
The 2005 Seattle mayoral election took place November 8, 2005. Incumbent Mayor Greg Nickels was reelected to a second term. As of 2022, this is the most recent Seattle mayoral election in which the incumbent was re-elected to a second term.
The primary was held September 20, 2005.
The general election was held November 8.