Covers the whole Yorkshire area. Specialist sections include Prehistoric Research, Roman Antiquities, Medieval History, Local History, Industrial History, Family History, and Aerial Photography, bring the total membership to over 2,000. A regular programme of meetings and events is held at Claremont and, increasingly, around the County. The Grants Committee supports excavation and post-excavation work. A large well-stocked library and archive. Numerous publications, some on microfiche. Visitors welcome, appointments required for use of the archive. Publishes the Yorkshire Archaeological Journal, Yorkshire Archaeological Report series, Update newsletter, section journals and other occasional publications.