Publishers
- The R.S. Surtees Society 1
- The R.T.S. Office 5
- The Radcliffe Press 1
- The Railway Correspondence And Travel Society 10
- The Railway Executive 1
- The Railway Gazette 1
- The Railway Publishing Co. Ltd. 6
- The Rampart Press 1
- The Random House Group 1
- The Ranelagh Press 1
- The Ray Society London 2
- The Readers Library Publishing Co. Ltd. 2
- The Rebel Press 1
- The Redcliffe Press 2
- The Regensteiner Corporation 1
- The Regimental Trust 10th Princess Mary's Own Gurkha Rifles 1
- The Regional Furniture Society 1
- The Reilly & Britton Co. 2
- The Religious Tract Society 47
- The Reprint Society 2
- The Richards Press 6
- The Richards Press Ltd. 22
- The Rissingtons Local History Society 1
- The Ritz Publishing Company 1
- The River Avon Improvement Association 1
- The Rockingham Press 2
- The Rolls House Publishing Co., Ltd. 1
- The Ronald Press Company 1
- The Royal Aeronautical Society 1
- The Royal Air Force College 3
- The Royal Anthroplogical Institute Of Great Britain And Ireland 3
- The Royal Commission On The Ancient And Historical Monuments Of Scotland 1
- The Royal Historical Society 6
- The Royal Incorporation Of Architects In Scotland 1
- The Royal Institute of British Architects 2
- The Royal Regiment Of Fusiliers 1
- The Royal Society 3
- The Royal Statistical Society 2
- The Royal Swedish Commission 2
- The Rubicon Press 2
- The Saalfield Publishing Company 7
- The Sabah Society 1
- The Saint Catherine Press 2
- The Saturn Press 1
- The Schoolgirls' own 1
- The Scientific Book Club 1
- The Scottish Railway Preservation Society 1
- The Scout Association 6
- The Sheldon Press 8
- The Shetland Times 3
- The Shoe Lane Publishing Co. 2
- The Shoe String Press 1
- The Sidney Press 1
- The Simon Archery Foundation 2
- The Society 1
- The Society For Theatre Research 2
- The Society of Antiquaries 1
- The Society Of Antiquaries Of London 2
- The Society Of British Aerospace Companies Ltd 1
- The Soman-Wherry Press Ltd. 1
- The Sonning & Sonning Eye Society 1
- The South Wales Institute Of Engineers 5
- The Southern Railway 1
- The Spalding Club 1
- The Sphere And Tatler 1
- The Sportsman's Press 4
- The SSS Radar Book Group 1
- The Stanborough Press Ltd. 2
- The Starling Press 16
- The Stationery Office 2
- The Stephen Greene Press 1
- The Stephenson Locomotive Society 1
- The Stonehill Publishing Company 4
- The Stroud And Nailsworth Defence Committee 1
- The Studio 5
- The Studio Ltd. 1
- The Sunday School Union 9
- The Sunshine Press 3
- The Surrey Record Society 1
- The Technical Publishing Co. Ltd. 1
- The Temple Press 3
- The Thames Publishing Co. 4
- The Thimble Press 2
- The Tothill Press 16
- The Trades Union Congress General Council 1
- The Transport Publishing Company 4
- The Travel Press & Publicity Co. 1
- The Trendine Press 3
- The Trustees Of The John Voelcker Bird Book Fund 1
- The Trustess of the British Museum 1
- The Tryon Gallery 2
- The Tuttle, Morehouse & Taylor Company 1
- The Typographic Etching Company 1
- The Uffici Press 1
- The Umberleigh Press 1
- The Unicorn Press 1
- The University of Alabama Press 1
- The University Of Arkansas Press 2
- The University of Georgia Press 2
- The University Press 1