| Election Name: | 1846 Philadelphia mayoral election |
| Type: | presidential |
| Ongoing: | no |
| Previous Year: | 1845 |
| Next Year: | 1847 |
| 1Blank: | General election vote |
| 2Blank: | General election percentage |
| 3Blank: | City Council vote |
| 4Blank: | City Council percentage |
| Image1: | File:John-Swift-Mayor-of-Philadelphia-e1486412581340 (1).jpg |
| Nominee1: | John Swift |
| 1Data1: | 5,562 |
| 2Data1: | 45.40% |
| 3Data1: | 30 |
| 4Data1: | 100% |
| Nominee2: | Richard Vaux |
| 1Data2: | 3,402 |
| 2Data2: | 27.77% |
| 3Data2: | 0 |
| 4Data2: | 0.00% |
| Image3: | File:3x4.svg |
| Nominee3: | Peter A. Brown |
| 1Data3: | 3,244 |
| 2Data3: | 26.48% |
| Mayor | |
| Before Election: | John Swift |
| Before Party: | Whig Party (United States) |
| After Election: | John Swift |
| After Party: | Whig Party (United States) |
The 1846 Philadelphia mayoral election saw John Swift reelected to office for a tenth overall non-consecutive term.
Beginning in 1839, the city operated under a mixed electoral system. Citizens voted for mayor in a general election. If a candidate receive a majority of the vote, they would be elected mayor. However, if no candidate received a majority, the City Council would select a mayor from the top-two finishers.