The Allegheny County Sheriff's Office (ACSO) is a local county law enforcement agency that serves both Pittsburgh and Allegheny County, Pennsylvania. It primarily provides court, warrant, bailiff, and jail/prisoner transport services for the county. In some jurisdictions it also supplements local law enforcement by providing reserve forces for backup. The Sheriff is an elected office. The ACSO has some oversight of Pittsburgh International Airport, which is located in the county.
The first sheriff to be elected in Allegheny County was James Morrison, who took office in January 1789, soon after the United States gained independence from Great Britain in the Revolutionary War.
James Morrison - 1789-1792
Samuel Ewalt - 1792-1795
James Sample - 1795-1798
Ephraim Jones - 1798-1801
William Wusthoff - 1804-1809
William McCandless - 1804-1809
William Woods - 1809-1810
L. Stewart (sheriff) - 1816-1819
Morgan Neville (sheriff) - 1819-1822
L. Stewart (sheriff) - 1822-1825
William Leckey - 1825-1828
W. Caven - 1828-1831
William Leckey - 1831-1834
Elijah Trovillo - 1834-1837
Andrew Bayne - 1837-1840
Benjamin Weaver - 1840-1843
Elijah Trovillo - 1843-1846
John Forsyth - 1846-1850
Carter Curtis - 1850-1852
William Magill - 1852-1856
Rody Patterson - 1856-1857
James L. Grahm - 1857-1861
Harry Woods - 1861-1863
John H. Stewart - 1864-1867
Samuel Cluley - 1867-1870
H.S. Fleming - 1870-1873
John H. Hare - 1873-1875
Richard H. Fife - 1876-1878
T.H. Hunter - 1879-1882
William McCallin - 1882-1884
Joseph H. Gray - 1884-1888
A. McCandless - 1888-1890
William H. McCleary - 1890-1894
James F. Richards - 1894-1896
Harvey A. Lowry - 1896-1900
William C. McKinley - 1900-1904
James W. Dickson - 1904-1906
Addison Gumbert - 1906-1910
Judd H. Bruff - 1910-1914
George Richards - 1914-1918
William S. Haddock - 1918-1922
Robert Woodside - 1922-1926
Robert H. Braun - 1926-1930
Robert S. Cain - 12/1930-1/1932
Frank I. Gollmar - 1932-1938
H. J. Heinz II - 1938-1942 (known as John Heinz in this period; later CEO of H.J. Heinz Company)
Robert J. Corbett - 1942-1944 (elected to Congress 1944)
John Montgomery - 1944-1945 (appointed by Governor)
Walter C. Monaghan - 1946-1951 (died September 19, 1951)
William D. McClelland - 1951 (acted in this position from September 19, 1951 – December 28, 1951, while he also served as Coroner)
Thomas E. Whitten December 28, 1951 – 1954
William H. Davis 1954-1970
Eugene L. Coon 1970-1997
Pete DeFazio 1997-2006
William P. Mullen 2006–Present
