| STOBBS (Stephenson) | Postmarks of the Australian forces from all fronts 1939 to 1953. [ct], 2nd ed [1976 & 1984] | Military |
| STOHL (Hans) | Postalische abstempelungen im derzeitigen Osterreichischen staatsgebiet von 1900 2 vols [1997] | N/A |
| STONE (J W M) | The maritime life of Capt Thomas Langley (? – 1696) [2002] | Maritime |
| STONE (J W M) | The inland posts (1392-1672): a calendar of historical documents – with appendices [1987] | N/A |
| STONE (J W M) | Cross Post: subject & geographical index Vols 1-10, 1985-2005 | N/A |
| STONE (J W M) | Col Roger Whitley and the Flanders Mail (1672-77) [2002] | N/A |
| STONE (JWM) | Old Down [1984] | N/A |
| STONE (Robert G) | The diverse world of postal markings of Gabon/Congo/A.E.F. [1987] | N/A |
| STONE (Robert G) | A Caribbean Neptune: the maritime postal communications of the Greater & Lesser Antilles in the 19th century [1993] | Maritime |
| STOTTER (D A ) | The British Post Office Service in Morocco 1907-57 [2007] | N/A |
| STOTTER (D A) | A Postcard from Tangier: A Postal & Social History of Tangier 1880-1958 [2015] | N/A |
| STRANGE (Arnold M) | A list of books on the postal history, postmarks & adhesive postage & revenue stamps of Great Britain [1971] | N/A |
| STRANGE (Ian J) | The Falkland Islands [1981] | N/A |
| STRATOUDAKIS (George) | Greece postal stationery [1985] | N/A |
| STROUD (J) | Annals of British and Commonwealth Air Transport 1919-1960 [1962] | Aviation |
| STROUD (J) | Railway Air Services [1987] | Aviation, Railways |
| STROUD (R) | The Postal History of the Burgher, Refugee and Concentration Camps of the Anglo-Boer War during 1900 to 1903 [2014] | Military |
| STROUD (Richard) | The impact of the Anglo-Boer war on the Orange Free State – October 1889 to March 1900 | Military |
| STROWSKI (Stephanie) | Les estampilles postales de la Grande Guerre: historique de la poste et de ses marques, dans l’Armee et la Marine Francaises 1914-20 [1976] | France, Military, WW1 |
| STUBBS (R M) | TPO postmarks of Great Britain 1962-1990 [1991] | Railways |
| STUBENS (F R) | The Mediterranean mails: a study of the mails from, to, and through the Mediterranean to the end of the 19th centuiry [1993] | Maritime |
| STUCKEY (Robert E) | The St Nazaire pocket August 1944 – May 1945; the background, vignettes & postal history [1982] | Military |
| STUDD (M A) | Paquebot & Ship Letter cancellations of the world 1894-1951 [1953] | Maritime |
| SUMMERFIELD (A E) | U.S. Mail – The Story of the United States Postal Service | N/A |
| SUNDSBO (Ivar) | Norske Brev for 1855 [1989] | N/A |
| SURANYI (L) | Handbook of the Hungarian pre-stamp mail | N/A |
| SUSSEX (Vivien J) | The Norwich Post Office 1568-1980, its postmasters, services & postal markings [1980] | N/A |
| SUSSEX (Vivien J) | Introducing postal history [1988] | N/A |
| SUSSEX (Vivien J) | Diss, Norfolk a postal history [1974] | N/A |
| SUSSEX (Vivien J) | Continental mail service 1793-1815 & especially by Yarmouth packet [1978] | Maritime |
| SUTCLIFFE (A P D) | The military mail of Jamaica: a philatelic history [1982] | N/A |
| SUTCLIFFE (D.) | Encylcopaedia of Jamaican Philately Vol. 9 – Military, Censorship & Patriotic Mails [2003] | Military |
| SVERIGES FILATELIST-FORENINGS RIKSORGANI | Handbok Over Svenska post- och makuleringsstamplar 1658-1951 [1952] | N/A |
| SWARBRICK (B) | The Royal Marines. Home & Abroad, A Postal History 1664 – 1994 [2006] | Military |
| SWIFT (H G) | A history of postal agitation from fifty years ago [1849] until the present day…[1900] | N/A |
| SWINDELLS (A) | Thomas Moore Musgrave – An Enigmatic Man [nd] | N/A |
| SWITZERLAND: Post Office/PTT | Geschichte der Schweizerischen Post 1849-1949 [1949] | N/A |
| SWITZERLAND: Post Office/PTT | Le centenaire des postes alpestres Suisses [1932] | N/A |
| TABEART (C) | British West African Mail packets to 1900 [2015] | Maritime |
| TABEART (Colin) | Australia New Zealand UK Mails to 1880 Vol 1, 2nd Edition [2011], Vol.2 | Maritime |
| TABEART (Colin) | United Kingdom letter rates 1657-1900 inland & overseas 1635 to 1900 [2003] | N/A |
| TABEART (Colin) | Steam conquers the world: an overview of steam communications in the 19th century. [1999] | Maritime |
| TABEART (Colin) | Robertson revisited: a study of the maritime postal markings of the British Isles, based on the work of Alan W Robertson [1997] | Maritime |
| TABEART (Colin) | Admiralty Mediterranean steam packets 1830 to 1857 [2002] | Maritime |
| Tabeart C. | British Long Distance Mail Packets 1793 to 1815 (2019) | Maritime |
| Tabeart C. | British Long Distance Mail Packets 1793 to 1815 (2019) | Maritime |
| TANTER (Herve) | Les boites mobiles de la voie de terre (1853-1869) [2004] | N/A |
| TAPPER (Geoffrey) | A postal history of Shaftesbury & district [2005] | N/A |
| TAYLOR (FW) | Colliery Postmarks [nd] | N/A |
| TAYLOR (JR) & SLABBINCK (H) | Mail from the French Shore of Newfoundland [2014] | Maritime |
