| Election Name: | 1893 San Diego mayoral election |
| Flag Image: | Flag of San Diego, California.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1891 San Diego mayoral election |
| Previous Year: | 1891 |
| Next Election: | 1895 San Diego mayoral election |
| Next Year: | 1895 |
| Nominee1: | William H. Carlson |
| Party1: | Independent (politician) |
| Popular Vote1: | 1,219 |
| Percentage1: | 46.8% |
| Nominee2: | Adolph Gassen |
| Party2: | Republican Party (US) |
| Popular Vote2: | 614 |
| Percentage2: | 23.6% |
| Nominee4: | A.E. Cochran |
| Party4: | Democratic Party (US) |
| Popular Vote4: | 465 |
| Percentage4: | 17.8% |
| Nominee5: | John Kastle |
| Party5: | People's Party (United States) |
| Popular Vote5: | 210 |
| Percentage5: | 8.1% |
| Mayor | |
| Before Election: | Matthew Sherman |
| Before Party: | Republican Party (US) |
| After Election: | William H. Carlson |
| After Party: | Independent (politician) |
The 1893 San Diego mayoral election was held on April 4, 1893, to elect the mayor for San Diego. William H. Carlson was elected Mayor with a plurality of the votes.
The 1893 election featured a field of five candidates. The Democrats, Republicans, and the People's Party each fielded one candidate. In addition to the regular parties, two independents also ran.
Many of the candidates had long roots in the City of San Diego prior to the election. Adolph Gassen had previously held other elected office within the city. John Kastle of the People's Party had previously served as president of the Chamber of Commerce. A.E. Cochran had been active in Democratic Party.
Independent candidate William H. Carlson campaigned vigorously, making numerous extravagant campaign promises, including electric car lines on every street, luxury hotels, steamship lines to every port on earth, transcontinental railroads, and jobs with high wages for all.
On April 4, 1893, Carlson was elected mayor with a plurality of 46.8 percent of the vote, nearly twice as many votes as his closest competitor.