The Historical and Genealogical Society’s Genealogical Library collects and makes available books, records, and materials of historical significance with a particular emphasis on Somerset County genealogies and historical material.
The Historical Society's Library currently features several thousand volumes including the following resources:
- Birth records: on microfilm 1893-1908
- Cemetery Records
- Census Records: indexes on shelf for 1790-1850, 1870-1880; Originals on microfilm 1790-1880, 1890, 1900-1920; 1930 census records for Somerset and Cambria Counties
- Church Histories
- Church Records
- County Histories: Somerset County, and miscellaneous counties in and out of Pennsylvania
- Crafts and trades
- Death Records: on microfilm 1852-1853, 1893-1908.
- Delayed Birth Records: 1941 - 1965
- Diaries, Ledgers, and Journals
- Estate Records: index on shelf, original records on microfilm
- Family Files: information contributed by researchers
- Family Histories: published and unpublished works by other researchers
- Genealogy Newsletters: index and originals of Laurel Messenger 1960 to present; Other societies in and out of county
- Historic Resource Survey: survey of historic buildings in Somerset County
- Immigration and Naturalization Records: on microfilm
- Land Records (Surveys, Warrants & Deeds): index for surveys & warrants on shelf, originals on microfilm
- Local Histories
- Maps: 18th century Harmon Husband's Map c1790, 1760s-1810s Township Surveys & Warrants, 1810, 1816, 1830 and 1860 maps of Somerset County, 1876 Beer's Atlas, "Bird's Eye View" maps of selected towns, Sandborn Fire Insurance Maps of selected towns, 4H plat books
- Marriage Records: on microfilm 1792-1802, 1885-1968
- Microfilm records from Somerset County Courthouse
- Military Records
- Newspapers: originals on microfilm
- Obituaries: approximately 20,000 in the card catalog and computer. More added daily.
- Reference Books
- Subject Files: collected information on topics concerning the county and region
- Surname Search Files: List of surnames other researchers are researching with names and addresses
- Tax Records: on shelf 1798 Direct Tax and miscellaneous years, on microfilm 1796-1879; Tax records from former Bedford County townships that are now part of Somerset County 1775 – 1793
