| Election Name: | San Bernardino mayoral election, 2018 |
| Flag Image: | File:Flag of San Bernardino, California.png |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 2014 San Bernardino mayoral election |
| Previous Year: | 2014 |
| Next Election: | 2022 San Bernardino mayoral election |
| Next Year: | 2022 |
| Election Date: | June 5, 2018 (first round)[1] November 6, 2018 (runoff) |
| 1Blank: | First-round vote |
| 2Blank: | First-round percentage |
| 3Blank: | Second-round vote |
| 4Blank: | Second-round percentage |
| Image1: | John Valdivia, Mayor of San Bernardino.jpg |
| Candidate1: | John Valdivia |
| 1Data1: | 6,747 |
| 2Data1: | 35.75% |
| 3Data1: | 19,155 |
| 4Data1: | 52.51% |
| Candidate2: | R. Carey Davis |
| 1Data2: | 5,243 |
| Color1: | c0c0c0 |
| 2Data2: | 27.78% |
| 3Data2: | 17,327 |
| Color2: | c0c0c0 |
| 4Data2: | 47.49% |
| Image3: | 3x4.svg |
| Candidate3: | Danny Tillman |
| Color3: | c0c0c0 |
| 1Data3: | 2,964 |
| 2Data3: | 15.71% |
| Color4: | c0c0c0 |
| Candidate4: | Rick Avila |
| 1Data4: | 1,414 |
| 2Data4: | 7.49% |
| Color5: | c0c0c0 |
| Candidate5: | Georgeann Hanna |
| 1Data5: | 1,324 |
| 2Data5: | 7.02% |
| Mayor | |
| Before Election: | R. Carey Davis |
| After Election: | John Valdivia |
The 2018 San Bernardino mayoral election was held on June 5, 2018, and November 6, 2018, to elect the mayor of San Bernardino, California. It saw the election of John Valdivia, who defeated incumbent mayor R. Carey Davis.
Municipal elections in California are officially non-partisan.