| Election Name: | 1899 San Diego mayoral election |
| Flag Image: | Flag of San Diego, California.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1897 San Diego mayoral election |
| Previous Year: | 1897 |
| Next Election: | 1901 San Diego mayoral election |
| Next Year: | 1901 |
| Image1: | Edwin M Capps.jpg |
| Image1 Size: | x150px |
| Nominee1: | Edwin M. Capps |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,714 |
| Percentage1: | 52.3% |
| Image2 Size: | x150px |
| Nominee2: | Daniel C. Reed |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,493 |
| Percentage2: | 45.6% |
| Mayor | |
| Before Election: | Daniel C. Reed |
| Before Party: | Republican Party (US) |
| After Election: | Edwin M. Capps |
| After Party: | Democratic Party (US) |
The 1899 San Diego mayoral election was held on April 4, 1899 to elect the mayor for San Diego. Edwin M. Capps was elected Mayor with a majority of the votes.
Incumbent Mayor Daniel C. Reed stood for re-election to a second two-year term as a Republican. His re-election was contested by Edwin M. Capps, a Democrat, and John Helphingstine of the Socialist Labor party.
One of the biggest issues during the campaign was municipal ownership of the water system. Capps, the city engineer, was seen as friendly to the San Diego Flume Company, while Reed was supported by the Southern California Mountain Water Company.
On April 4, 1899, Capps was elected mayor with a majority of 52.3 percent of the vote. Reed came in second with 45.6 percent of the vote. Helphingstine came in third with only 2.1 percent.