| Election Name: | 1933 Pittsburgh mayoral election |
| Flag Image: | Flag of Pittsburgh, Pennsylvania.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1929 Pittsburgh mayoral election |
| Previous Year: | 1929 |
| Next Election: | 1937 Pittsburgh mayoral election |
| Next Year: | 1937 |
| Election Date: | November 6, 1933 |
| Image1: | William N. McNair.jpg |
| Nominee1: | William N. McNair |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 102,867 |
| Percentage1: | 57.3% |
| Nominee2: | John Herron |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 75,674 |
| Percentage2: | 42.2% |
| Mayor | |
| Before Election: | John Herron |
| Before Party: | Republican Party (United States) |
| After Election: | William N. McNair |
| After Party: | Democratic Party (United States) |
The Mayoral election of 1933 in Pittsburgh, Pennsylvania was held on Tuesday, November 6, 1933. In a realigning election, Democrats regained control of the mayor's office for the first time in twenty-eight years; they have not relinquished this position since.
The incumbent mayor, John Herron of the Republican Party chose to run for his first full term. Herron had been elevated to the executive office from his position as city council president after Charles H. Kline resigned due to a fiscal scandal. Herron inherited a party whose once efficient machinery was in crisis.
Democrats, led by new powerful grassroots organizer David Lawrence (a future mayor), selected William McNair, an idealistic and outspoken attorney as their candidate. As the New Deal began, Pittsburgh's strong labor community moved rapidly toward the Democrats, creating a huge shift in voting patterns and allowing McNair to win.
Incumbent mayor John Herron won a divided Republican Primary against Councilman Peter J. McArdle and Register of Wills Joseph Mackrell.[1] [2] [3]
William McNair won the Democratic Primary.
A total of 179,425 votes were cast.
Herron received 75,405 votes on the Republican ticket, 258 on the Citizens' Party ticket, and 11 on non-partisan ballots.
†Mackrell received 154 votes on Liberal Party and 101 on Square Deal Party ballots.