| Election Name: | 1945 Pittsburgh mayoral election |
| Flag Image: | Flag of Pittsburgh, Pennsylvania.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1941 Pittsburgh mayoral election |
| Previous Year: | 1941 |
| Next Election: | 1949 Pittsburgh mayoral election |
| Next Year: | 1949 |
| Election Date: | November 6, 1945 |
| Image1: | David L. Lawrence (1).jpg |
| Nominee1: | David Lawrence |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 115,315 |
| Percentage1: | 53.3% |
| Nominee2: | Bob Waddell |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 100,976 |
| Percentage2: | 46.7% |
| Mayor | |
| Before Election: | Conn Scully |
| Before Party: | Democratic Party (United States) |
| After Election: | David Lawrence |
| After Party: | Democratic Party (United States) |
The Mayoral election of 1945 in Pittsburgh, Pennsylvania was held on Tuesday, November 6, 1945. Incumbent Democratic Party Conn Scully chose not to seek reelection. State Democratic Party chairman and longtime Pittsburgh political player David Lawrence was elected to succeed him in what is the city's most recent competitive race. Bob Waddell, the popular football coach of Carnegie Tech (now Carnegie Mellon University) ran for a second time using his colorful personality and sports fame. However, the powerful Lawrence was able to rally a large base en route to a close win.