Allegheny County, one of the popular counties in the state of Pennsylvania, was named for the Allegheny River. It was founded in the year 1788. Its county seat is Pittsburgh and the largest city is also the same. More than 1.2 million people with a racial makeup including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others along with 0.53 million households and 0.33 million family units reside in this region.

Allegheny County Index repository is an excellent repository that features wide range of data and information that discloses invaluable social history, genealogy, and economic and cultural truths. An enriched compilation of data including ancestral SSN, war and service records, birth identity details, marriage and divorce declaration, will and estate data, probates and liens, immigration and naturalization statistics, court proceedings, land allotment activities, death news together with census figures plays significant role in providing required clues about the genealogical and historical research.