This is a list of mayors of the Pittsburgh suburb and "twin city" of Allegheny, Pennsylvania which was annexed by Pittsburgh in 1907 and is currently the North Side of the city.
Mayoral terms were for one year until 1868, two years from 1868-1872, and three years from 1872 on.
| Mayor | Party | Took office | Left office | Notes |
|---|---|---|---|---|
| William Robinson Jr. | Whig | 17 Jul 1840 | 15 Jan 1841 | First white child born on the site of Allegheny City |
| Thomas Sample | Whig | 15 Jan 1841 | 28 Jan 1842 | |
| William Barclay Foster | Independent | 28 Jan 1842 | 12 Jan 1844 | Father of songwriter Stephen Foster |
| Hezekiah Nixon | Whig | 12 Jan 1844 | 16 Jan 1846 | |
| Robert Simpson Cassatt | Whig | 16 Jan 1846 | 15 Jan 1847 | Father of painter Mary Cassatt |
| Henry Campbell | Whig | 15 Jan 1847 | 12 Jan 1849 | |
| Jonathan Rush | Whig | 12 Jan 1849 | 11 Jan 1850 | |
| Hugh S. Fleming | Whig | 11 Jan 1850 | 14 Jan 1853 | |
| Robert W. Park | Whig | 14 Jan 1853 | 13 Jan 1854 | |
| William B. Adams | Independent | 13 Jan 1854 | 16 Jan 1857 | |
| Herman Jeremiah DeHaven | Independent Republican | 16 Jan 1857 | 15 Jan 1858 | |
| Jacob Stuckrath | Democratic | 15 Jan 1858 | 14 Jan 1859 | |
| John Morrison | Republican | 14 Jan 1859 | 11 Jan 1861 | |
| Simon Drum | Republican | 11 Jan 1861 | 12 Aug 1862 | Greeted Abraham Lincoln in his visit here on 14 February 1861; resigned to enter Civil War |
| James Miller | 12 Aug 1862 | 4 Sep 1862 | Acting mayor for 24 days upon Drum's departure | |
| Alexander C. Alexander | Republican | 4 Sep 1862 | 13 Jan 1865 | Completed Drum's unexpired term, then re-elected twice |
| John Morrison | Republican | 13 Jan 1865 | 17 Jan 1868 | |
| Simon Drum | Republican | 17 Jan 1868 | 14 Jan 1870 | |
| Alexander Purviance Callow | Republican | 14 Jan 1870 | 18 Apr 1874 | Only mayor to die in office |
| David Neillie | Republican | 18 Apr 1874 | 21 May 1874 | Appointed to temporary office upon the death of Callow |
| Hugh S. Fleming | Republican | 21 May 1874 | 5 Jan 1875 | Completed Callow's unexpired term |
| Ormsby Phillips | Independent | 5 Jan 1875 | 8 Jan 1878 | |
| Thomas Megraw | Republican | 8 Jan 1878 | 4 Apr 1881 | |
| Lewis Peterson, Jr. | Republican | 4 Apr 1881 | 7 Apr 1884 | |
| James G. Wyman | Republican | 7 Apr 1884 | 4 Apr 1887 | |
| Richard Turner Pearson | Republican | 4 Apr 1887 | 7 Apr 1890 | |
| James G. Wyman | Republican | 7 Apr 1890 | 24 Feb 1892 | Only mayor to be impeached and put in jail while in office |
| Nicholas H. Voegtly | Republican | 24 Feb 1892 | 2 May 1892 | Served as mayor during Wyman's impeachment and imprisonment |
| William M. Kennedy | Republican | 2 May 1892 | 6 Apr 1896 | Completed Wyman's unexpired term, then re-elected |
| Charles Geyer | Republican | 6 Apr 1896 | 3 Apr 1899 | |
| James G. Wyman | Republican | 3 Apr 1899 | 28 May 1901 | Ousted by state government's "ripper bill" |
| John R. Murphy | Republican | 28 May 1901 | 6 Apr 1903 | Appointed by Gov. William A. Stone under the ripper bill; title of office changed to "Recorder" |
| James G. Wyman | Citizens / Democratic | 6 Apr 1903 | 2 Apr 1906 | Title of office restored to Mayor on 24 April 1903 |
| Charles Frederick Kirschler | Republican | 2 Apr 1906 | 6 Dec 1907 | Last two years of his term served as Deputy Mayor of Pittsburgh |
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