| Election Name: | 2003 Philadelphia mayoral election |
| Country: | Philadelphia |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1999 Philadelphia mayoral election |
| Previous Year: | 1999 |
| Next Election: | 2007 Philadelphia mayoral election |
| Next Year: | 2007 |
| Turnout: | 50%[1] 5 pp |
| Election Date: | November 4, 2003 |
| Image1: | File:John F Street.jpg |
| Nominee1: | John F. Street |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 267,230 |
| Percentage1: | 58.34% |
| Nominee2: | Sam Katz |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 189,357 |
| Percentage2: | 41.34% |
| Map Size: | 260px |
| Mayor | |
| Before Election: | John F. Street |
| Before Party: | Democratic Party (United States) |
| After Election: | John F. Street |
| After Party: | Democratic Party (United States) |
The 2003 Philadelphia mayoral election was a contest between Democratic incumbent John F. Street and Republican businessman Sam Katz.
Pennsylvania Governor and former Mayor of Philadelphia Ed Rendell played a key role for Street by ensuring that business interests did not support Katz.[2]
The race was covered in the documentary film The Shame of a City. This was the last election prior to the 2019 election that saw a Republican nominee carry a ward, with Katz carrying several.
Mayor John Street was unopposed for renomination by the Democratic Party.
Sam Katz was unopposed for the Republican nomination.