| ROSSALL (David B) | The Postal History of the City of York to 1900 [2003] | Great Britain |
| ROSSICA | The 1872 Postal Treaty between Italy & Russia [1991] | Italy, Russia |
| ROSSICA | Postal convention between Austria & Russia (1843) [1991] | Russia |
| ROSSITER (Stuart) | History of East African Army Postal Service (1915-1945) [1985] | Military |
| ROSSITER POSTAL HISTORY JOURNAL | The West India & Pacific Steam Ship company – The Mail Contracts 1865-88 [2006] | Maritime |
| ROTHSCHILD (Arthur de) | Histoire de la poste aux lettres et du timbre-poste depuis leurs origines jusqu’a nos jours, 3rd ed, 2 vol [1876] | France |
| ROUSSELIN | L’ Acheminement des Correspondance entre La Havre & les Pays D’Outre -Mer [1957] | Forwarding Agents, Maritime |
| ROUX (Le M) | Post Offices of Europe 18th – 21st Century, A Comparative History [2007] | N/A |
| ROWE (Kenneth) | The postal history of the forwarding agents [1984] | Forwarding Agents, Maritime |
| ROWE (Kenneth) | The postal history of the Canadian contingents in the Anglo-Boer War 1899-1902 [1981] | Military |
| ROYAL PHILATELIC SOCIETY LONDON | The RPSL visits the Collectors Club [2005] | N/A |
| ROYAL PHILATELIC SOCIETY of NEW ZEALAND | The postage stamps of New Zealand [incl postal history], vol 3-7 [1955-1988] | N/A |
| RUFFLE (J W B) | Mauritius.. the To Pay manuscript and handstamp markings 1860-1876 [1985] | N/A |
| RUFFLE (J W B) | The maritime mails of Mauritius 1815-1868, Pts 1 & 2 [1987-88] | Maritime |
| RUSS (Peter | Katalog der aerogramme von Australien und Ozeanien | N/A |
| RUTHERFORD (V A) | The postal history of Papua New Guinea 1945-1984, vol 1, 2nd edition [1984] | N/A |
| RUTLAND | Turnpikes & Royal Mail of Rutland [1982] | N/A |
| RYAN (G S) | Die entwertungen der Ungarischen postamter auf den ersten funf ausgaben osterreichischer freimarken 1850-1867 [1980] | N/A |
| SACHER (John) | West Africa [2008] | N/A |
| SACHER (John) | The postal services of the Gold Coast to 1901 [2003] | N/A |
| SACHER (John) | The postal services of the British Nigeria region prior to 1914, including the British Consular | N/A |
| SACHER (M) | The postmarks & other markings of Mandate Jerusalem (1917-1948) | N/A |
| SACHER (M) | Government, “Certified Official” and Post Office cachets of the British Mandate of Palestine [1981] | Official |
| SACHER (Michael) | The postal markings of Mandate Palestine 1917-1948 [1995] | WW1 |
| SACHER (Michael) | Army Field Post Office of Egypt & the EEF 1914-20 [1970] | Military, WW1 |
| SALAM H. | The Egyptian Maritime Postal History 1845-1889 (2019) | Maritime |
| SALIERNO (Vito) | I viaggi di Toscana [nd] | N/A |
| SALLES (Raymond) | La poste maritime francaise historique et catalogue, 9 vols [1961-1975] | France, Maritime |
| SALMON (Michael) | The life and works of Charles Whiting and the Beaufort House Press: A Treasury Competition winner [2007]. | Rowland Hill |
| SALT (Denis) | British postal rates 1635 to 1839. | N/A |
| SALT (Denis) | The domestic packets between Great Britain & Ireland, 1635-1840. [1991] | Maritime |
| SALVI (Lieut-Colnel Constantine) | Postmarks of Portugal [1929] | N/A |
| SAMARES (D) | Cancellations of the Greek steamship companies [1964] | Maritime |
| SAMPSON (E N) | United States Territorial postmark catalog: stampless cover section. [1950] | N/A |
| SAMPSON (R H) | The stamps of Morocco Agencies. [1959] | N/A |
| SANDERS (Obre 0J) | Ceylon postal history 1857-1902. [1999] | N/A |
| SANFORD (K C) | Air Crash Mail of Imperial Airways & Predecessor Airlines [2003] | Aviation |
| SANFORD (O R) | British postal rates 1635 to 1839. [1990] | N/A |
| SANKEY (Marjorie) | ‘Care of Mr Waghorn’ [1964] | Maritime |
| SARAWAK SPeCIALISTS' SOCIeTY | Brunei 1906-2006: notes on a display to the RPSL, 9 March 2006 | N/A |
| SASSONE EDITRICE | Annullamenti di Sicilia (1859-1863) [1968] | N/A |
| SAULGRAIN (Pierre) | Le service postal arien dans les pays d’expression francaise: catalogue descriptif et historique 1906-1986 [1996] | Aviation, France |
| SAULGRAIN (Pierre) | 100 ans de poste arienne en France: catalogue descriptif et historique 1870-1969 [1994] | Aviation, France |
| SAUX (P Le) | The Post, a Universal link between men | N/A |
| SAVAGE (Betty) | The undated circular marks of Somerset & Dorset | N/A |
| SAVOIE (A) | The Post, a Universal link between men | N/A |
| SAYERS (W) | Hong Kong & the Treaty Ports: postal history & postal markings…revised by H E Lobdell & Adrian Hopkins [1949] | N/A |
| SCADTA | Selected notes on Colombian airmails 1920 onwards: ‘Consular’ agents, postal rates & routes for | Aviation |
| SCAMP (L.C.) | French Mail Paquebot Far East Itineraries 1862-1880 Vol. 2 [2010] | Maritime |
| SCAMP (Lee C) | Far East mail ship itineraries: British, Indian, French, American and Japanese mail ship schedules Vol. 1 1840-1880 [1997] | Maritime |
