| SCHAAF (Joachim) | Die irischen postgebuhren vor 1840: Irish postal rates before 1840. 2nd ed | N/A |
| SCHAFER (Richard) | Tarif – Routes / Traites postales Suisse – Tarifs – Routes | N/A |
| SCHAFER (Richard) | 1609-1798 Postvertrage – Taxen – Routen alte eidgenossenschaft / Swiss postal contracts – Tarifs -Routes [2000] | N/A |
| SCHAFER (Richard) | Anfange bis 1798: das postwesen der alten eidgenossenschaft / Swiss postal history of the Old Confederation [2000] | N/A |
| SCHAFER (Richard) | 1459-1907 die briefpostverkehr Schweiz-Ausland: Swiss letter mail to foreign countries [1996] | N/A |
| SCHATKES (Joseph) | The cancellations of Mexico 1856-1874; revised edition by Karl H Schwimmer [1983] | N/A |
| SCHEELE (Carl H) | Neither snow, nor rain – the story of the United States Mails [1971] | N/A |
| SCHILLING (E) | The Maritime Postmarks of the Danish Kingdom, 2009 | Scandinavia |
| SCHIMMER (Karl H) | The postmarks of Mexico 1874-1900 [1977] | N/A |
| SCHIMMER (Karl H) | Mexican maritime mail: a postal history from colonial times to the 20th century [1997] | Maritime |
| SCHLICHTER (Andres Jorge) | Historia postal de la tripulacion del acorazado Admiral Graf Spee (Argentina Diciembre 9 – Alemania Junio 1946 [1989], | Maritime |
| SCHMIDT (W) | Geschichte der Deutschen Post in den kolonien im ausland [1939] | N/A |
| SCHMITT (Gunter) | 20 kapitel fruhe luftfahrt [1990] | Aviation |
| SCHOENFELD (Hans) | Cancellations of the Treaty Posts of Hong Kong 1850-1930 [1988] | N/A |
| SCHOUBERECHTS (V) | The Post Book: 500 Years of History in Europe [2016] | N/A |
| SCHULER (Gerhard) | Danzigs postgeschichte [1981] | N/A |
| SCHWEIGER-LERCHENFELD (A. F.) | Das neue buch der weltpost: geschichte, organisation und technif des postwesens von der altesten zeiren bis auf die gegenwart [1901-02] | N/A |
| SCHWIPPS (Werner) | 20 kapitel fruhe luftfahrt | N/A |
| SCIAKY (Roberto) | Ethiopia Haile Selassie: the exile, the restoration, the deposition – history, stamps and postal history 1936-1974 [2003] | N/A |
| SCOTT (Aubrey H) | The cancellations & postal markings of Basutoland/Lesotho post offices and their historical background [1980] | N/A |
| SCOTT (C) | From Beef Tea to Battleship [2020] | Maritime, Military, Naval |
| SCOTT (John G S) | Official franking 1800-1840 [1983] | Franking |
| SCOTT-HILL (Ian) | Channel silver wings: a record of air service 1947-1972 [1972] | Aviation |
| SCOTTISH POSTAL HISTORY SOCIETY | Kirkwood’s Proof Books 1829-1918 (CD) [2012] | N/A |
| SCOTTISH POSTMARK GROUP | Experimental duplex cancellations of Scotland [1963] | N/A |
| SCOTTISH POSTMARK GROUP | Dotted circle postmarks of Scotland [1962] | N/A |
| SEARS (John) | The airmails of Egypt, 2nd ed [1991] | Aviation |
| SEDGEWICK (W A) | The Temporary Handstamps of Yorkshire [1988] | N/A |
| SEDGEWICK (William A) | The Postal History of Goole, Howden & Selby [1981] | N/A |
| SEDGEWICK (William A) | The Postal History of Doncaster [1975] | N/A |
| SEDGWICK (W A) | The Scottish additional halfpenny mail tax 1813-1839, 2nd ed | N/A |
| SEEBALD (H) | Osterreichische un-einsatze im nahen osten [1987] | N/A |
| SEKELJ (Berislav) | Handbook & catalogue: postal history Bosnia & Herzegovina [2005] | N/A |
| SENECHAL (J) | Bureaux Speciaux Franchises Contreseings Marques Administratives Vol 1 Des origines a 1900 [1998]; Vol 2 Les Bureaux Speciaux du Second Empire [1995] | Official Mail |
| SENECHAL (Jean) | La Legion d’honneur: deuxieme centenaire de l’ordre, histoire postale, lettres – documents | Military |
| SENECHAL (Jean) | Joachim Murat: le roi de plus braves – le plus brave des rois [2000] | Military |
| SERON (ZM) | From the Winged Heels of Mercury [1984] | N/A |
| SESSIONS (David F) | The early rapid cancelling machines of Canada [1982] | Mechanisation |
| SETTLE ( Mary Lund) | The story of the Pony Express [1955] | N/A |
| SHELLEY (Ronald G) | The British Legion in Spain during the first Carlist War 1832 -1839 [1975] | Military |
| SHELLEY (Ronald G) | The Spanish Civil War 1936-1939 [1964] | Military |
| SHELLEY (Ronald G) | The postal history of the International Brigades in Spain 1936 to 1939, 2nd ed [2000] | Military |
| SHELLEY (Ronald G) | The postal history of the Canary Islands [1987] | N/A |
| SHELLEY (Ronald G) | A guide to the postal history of the Spanish Civil War 1936-1939, 2 vols [nd] | Military |
| SHELLEY (Ronald G) | A guide to the postal history of Spain: a personal journey [1996] | N/A |
| SIAM: MINISTRY of COMMUNICATIONS | Postal progress in Siam 1885-1925 [1985 reprint] | N/A |
| SIDEBOTTOM (John K) | The Overland Mail: a postal historical study of the mail route to India [1948] | N/A |
| SIEH (Pingwen) | Postage rates of China 1867-1980 [1981] | N/A |
| SIGGERS (John) | Further notes on Wiltshire and its postmarks, edited by Norman Higson | N/A |
| SIGGERS (John) | Wiltshire and its Postmarks [1982] | N/A |
