| Election Name: | 1923 San Diego mayoral election |
| Flag Image: | Flag of San Diego, California.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1921 San Diego mayoral election |
| Previous Year: | 1921 |
| Next Election: | 1925 San Diego mayoral election |
| Next Year: | 1925 |
| Nominee1: | John L. Bacon |
| Party1: | Republican Party (US) |
| Popular Vote1: | 9,848 |
| Percentage1: | 59.6% |
| Nominee2: | Charles E. Rinehart |
| Party2: | Nonpartisan candidate |
| Popular Vote2: | 5,935 |
| Percentage2: | 35.9% |
| Mayor | |
| Before Election: | John L. Bacon |
| Before Party: | Republican Party (US) |
| After Election: | John L. Bacon |
| After Party: | Republican Party (US) |
An election was held on March 20, 1923, to elect the mayor for San Diego. Incumbent mayor John L. Bacon stood for reelection. In the primary election, Bacon received a majority of the votes and was elected outright with no need for a contested runoff.
Incumbent Mayor John L. Bacon stood for reelection to a second term. On March 20, 1921, Bacon received an absolute majority of 59.6 percent in the primary election, more than 23 percent higher than his nearest competitor, Charles E. Rinehart. Bacon received one hundred percent of the vote in the uncontested runoff election held April 3, 1923 and was elected to the office of the mayor.
Because Bacon won outright in the primary with a majority of the vote, his was the only eligible name on the runoff ballot.