| Election Name: | 1905 San Francisco mayoral election |
| Country: | San Francisco |
| Flag Image: | Flag of San Francisco (1900-1940).svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1903 San Francisco mayoral election |
| Previous Year: | 1903 |
| Next Election: | 1907 San Francisco mayoral election |
| Next Year: | 1907 |
| Image1: | Eugene E. Schmitz 1905 Crop.jpg |
| Candidate1: | Eugene E. Schmitz |
| Party1: | Union Labor Party (California) |
| Popular Vote1: | 40,191 |
| Percentage1: | 56.58% |
| Candidate2: | John S. Partridge |
| Party2: | Fusion |
| Popular Vote2: | 28,687 |
| Percentage2: | 40.39% |
| Mayor | |
| Before Election: | Eugene E. Schmitz |
| Before Party: | Union Labor Party (California) |
| After Election: | Eugene E. Schmitz |
| After Party: | Union Labor Party (California) |
The 1905 San Francisco mayoral election was held on November 7, 1905. Incumbent Eugene E. Schmitz was reelected with 56% of the vote.