Pennsylvania Railroad Technical & Historical Society

Pennsylvania Society of Sons of the Revolution

Pennsylvania Society of the Daughters of the American Colonists

[The original link is broken. This link points to an archived copy on the Wayback Machine]

Pennsylvania Society of the Order of the Founders and Patriots of America

Penobscot County Genealogical Society

Bangor, Maine. A chapter of the Maine Genealogical Society.

Pensacola Historical Society

Pensacola, Florida.

Pentrich Historical Society

Derbyshire, England.

Peoria County Genealogical Society

Illinois.

Pepperell Historcial Commission

Massachusetts.

Permian Basin Genealogical Society#160;

Perry County Historical Society

Illinois.

Perry County Historical Society

Perryville, Missouri.

Perry County Historical Society

Ohio.

Perry Historical Society

Perry, Ohio.

Perry Township of Allen County Ohio Historical Society

Information including people, clubs and organizations, genealogy, first families and general history of the township and its' people.

Person County Historical Society

Roxboro, North Carolina.

Perth County Branch, Ontario Genealogical Society

Perth Dead Person's Society

Australia.

Pesaro: Societa' pesarese di studi storici

Italy. Association promoting the historical research and study of Pesaro and its region.

Peterborough & District Family History Society

Northamptonshire, England.