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Allegheny County, Pennsylvania
Genealogy, History & Facts

Allegheny County, Pennsylvania Facts

Allegheny County

When was Allegheny County, PA Created?
Allegheny County was established on September 24, 1788, from Washington County and Westmoreland County. The county was named for Lenape word for the Allegheny River, which possibly translates to "beautiful river" .

What is the County Seat of Allegheny County, PA?
The County Seat is located in Pittsburgh and in addition the county government website is

What counties are adjacent to Allegheny County, PA?
Bordering Counties are Butler County (north), Armstrong County (northeast), Westmoreland County (east), Washington County (southwest), Beaver County (northwest).

Allegheny County Townships Map

What cities and towns are in Allegheny County, PA?
Municipalities located in Allegheny County include Townships: Aleppo, Baldwin, Collier, Crescent, East Deer, Elizabeth, Fawn, Findlay, Forward, Frazer, Hampton, Harmar, Harrison, Indiana, Kennedy, Kilbuck, Leet, Marshall, McCandless, Moon, Mount Lebanon, Neville, North Fayette, North Versailles, O'Hara, Ohio, Penn Hills, Pine, Reserve, Richland, Robinson, Ross, Scott, Shaler, South Fayette, South Park, South Versailles, Springdale, Stowe, Upper St. Clair, West Deer, Wilkins. Boroughs: Aspinwall, Avalon, Baldwin, Bell Acres, Bellevue, Ben Avon, Ben Avon Heights, Bethel Park, Blawnox, Brackenridge, Braddock, Braddock Hills, Bradfordwoods, Brentwood, Bridgeville, Carnegie, Castle Shannon, Chalfant, Cheswick, Churchill, Coraopolis, Crafton, Dormont, Dravosburg, East McKeesport, East Pittsburgh, Edgewood, Edgeworth, Elizabeth, Emsworth, Etna, Forest Hills, Fox Chapel, Franklin Park, Glassport, Glenfield, Green Tree, Haysville, Heidelberg, Homestead, Ingram, Jefferson Hills, Leetsdale, Liberty, Lincoln, McDonald, McKees Rocks, Millvale, Monroeville, Mount Oliver, Munhall, North Braddock, Oakdale, Oakmont, Osborne, Pennsbury Village, Pitcairn, Pleasant Hills, Plum, Port Vue, Rankin, Rosslyn Farms, Sewickley, Sewickley Heights, Sewickley Hills, Sharpsburg, Springdale, Swissvale, Tarentum, Thornburg, Trafford, Turtle Creek, Verona, Versailles, Wall, West Elizabeth, West Homestead, West Mifflin, West View, Whitaker, White Oak, Whitehall, Wilkinsburg, Wilmerding. Cities & Towns: Clairton, Duquesne, McKeesport, Pittsburgh . See also Allegheny County Municipalities Incorporation Dates.

Allegheny County, PA Vital Records

Where can find Allegheny County Birth, marriage, Divorce and Death Records?
Allegheny County vital records can be found at the Pennsylvania Office of Vital Records has copies of birth and death records since 1906 and death records. There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in Pennsylvania for current fees and application process. Birth, marriage, and death records are connected with central life events.

You can search online for Allegheny County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for Pennsylvania  Birth CertificateDeath Certificate Applications to mail. Walk-in service is available at any of these six public offices: Erie, Harrisburg, New Castle, Philadelphia, Pittsburgh or Scranton.

Allegheny County, PA Census Records

What Allegheny County, PA census records are available?
There are many types of census records for Allegheny County guide you in researching your family tree. Federal Population Schedules are available for 1790, 1800, 1810, 1820, 1830, 1840, 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

Allegheny Co. Mortality Schedules can be obtained for 1850, 1860, 1870 and 1880. Allegheny Co. Industry and Agriculture Schedules can be acquired for 1850, 1860, 1870 and 1880. Allegheny Co. Union Veterans Schedules can be found for 1890. You can find free down-loadable and also printable census forms to help you with your research. See Also Pennsylvania Census Records Research Guide

Allegheny County, PA Courthouse and Government Records

Allegheny County Courthouse

What genealogical records can I find in the Allegheny County Courthouse?
The below facts shows exactly what death, marriage, birth, property, wills, and court records are typically in Allegheny County. The years listed below are the first noted records with this county. See Also Pennsylvania Corthouse Records Research Guide.

  • Allegheny County Recorder of Deeds is responsible for recording documents related to property. Documents recorded consist of, but are not limited to, deeds, mortgages, restrictions, notaries, public and elected county officers. Other documents, such as Military Service Discharges, foreign birth certificates, as well as obscure documents like cattle brands, are also recorded here.
    • Address: 542 Forbes Avenue, Room 101, Pittsburgh, PA 15219
    • Phone: (412) 350-4226
    • Land Records: 1788
  • Allegheny County Prothonotary / Clerk of Courts has been the clerk of court of common pleas since 1707. Court records here include divorces, naturalizations, peddlers' licenses, registration of attorneys, oaths of county officers, equity, sheriff's sales, juror lists, some tax records, and some civil court records.Other court records are with the clerk of courts.
    • Court & Divorce Records:1788
  • Allegheny County Register of Wills/ Orphan's Court Clerk are often the same person, sometimes sharing the responsibility of the recorder of deeds and clerk of courts as well. The Register of Wills' principal duties include probating wills and accepting for filing all documents necessary to complete the administration of a decedent's estate. The Clerk of Orphans' Court, our office serves as the filing office and custodian of records for matters involving adoptions, guardianships and estate litigation. The office also issues all marriage licenses. Since 1885 the clerk of the orphans' court in each county has had the responsibility of recording marriages
    • Address: 414 Grant Street; 1st Floor, Pittsburgh, PA 15219
    • Phone: (412) 350-4180
    • Marriage & Probate Records: 1789 
    • Birth & Death Records: before Jan 1906
  • Allegheny County Tax Assessor Office has tax records but may also be in the county commissioners' office or with the prothonotary.
  • Pennsylvania, Wills and Probate Records, 1683-1993
  • Early Pennsylvania Land Records  
  • BLM Land Records

Allegheny County, PA Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for Allegheny County, PA?
A list of Allegheny County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide Pennsylvania Archives, Historical & Genealogical Societies.

Where can I connect with other Allegheny County, PA Researchers through message boards and forums?

What other genealogical resources are available in Allegheny County, PA?
The following are web links to Genealogy, Records and Resources pertaining to Allegheny County. Each of these genealogy links fall into 3 categories: Business oriented Sites, Private Sites or Organization Sites. Some have free access some require a cost. This is basically a listing which has been compiled or submitted. I do not recommend or promote one genealogy site over another.

Allegheny Co. PA Maps, Atlases & Gazetteers

Allegheny Co. PA Books, Newspapers & Publications

Allegheny Co. PA Church / Bible Records & Cemeteries / Graveyards

Allegheny Co. PA Family Websites, Pictures & Histories

Allegheny Co. PA General and History Websites

Allegheny Co. PA Immigration & Naturalization

Allegheny Co. PA Military Records

Allegheny Co. PA Schools & Directories

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