The Historical Society of Hilltown Township (Bucks County, Pennsylvania) was established in 1975 to "promote interest in the historical heritage of the township. By preserving buildings, documents and artifacts, and encouraging research, it is hoped to bring the past into perspective." The Society's archival holdings, which encompass over 45 linear feet and date from the late 18th century to the present, consist of various primary-source materials that document Hilltown Township individuals, families, businesses, and properties. These include deeds, personal papers relating to some of the first families of Hilltown, materials relating to area schools, historic site survey forms, photographs, and records of local businesses and organizations. Of special interest is the William Collier slides and files, 1925-1977, that includes 5,200 slides of structures and sites of Bucks County and surrounding areas, local history research files, and professional papers relating to his work for Pennsylvania's Bureau of Employment Security from the 1930s to the 1960s.