| JOHNSON (L J) | The posts of Essex | N/A |
| JOHNSON (Peter) | The British travelling post office [1985] | Railways |
| JOHNSON (Peter) | Mail by rail: the history of the TPO and Post Office railway [1995] | Railways |
| JOHNSON (R I) | Iraq – Postal History 1920 to 1940 | N/A |
| JOHNSON (Robert I) | The United States of America: suspension of mail services to other countries in wartime, revolution and | Military |
| JOHNSON (Robert I) | Unpaid and underpaid mail 1840 to 1921, England and Wales [1982] | N/A |
| JOHNSON (Robert I) | British postal rates 1937-2000: Dulac, Wilding and Machin issues [2000] | N/A |
| JOHNSON (Robert I) | Suspension of Mail Services [1986] | Military |
| JONES (Bryan A) | The Fiji Bomber Fund [1996] | Military |
| JONES (David) | The time shrinkers – Africa: the development of civil aviation between Britain and Africa [1977] | Aviation |
| JONES (Frank G) | Etiquettes: Par Avion: By Air Mail [1992] | Aviation |
| JONES (N M) | The cancellations and postmarks of Nigeria 1914-1980: including travelling and mobile post offices [1994] | N/A |
| JONES (R G) | The postal history of Caernarfon 1840-1940 [1979] | N/A |
| JONES (TE) | A postal history of the Arabian Gulf post offices Vol 3 Oman [2007] | N/A |
| JUHL (Mogens) | Denmark: the inland mail 1871-1902. The 1871 & 1888 postal reforms; the 1875 monetary reform [1990] | Scandinavia |
| JUHL (Mogens) | Postage stamps and postal history of Western Australia Vol 3, The Colonial Postmarks 1829-1901 [1983] | N/A |
| JULIENNE (G) | Catalogue des Marques Postales de la Sarthe 1700-1876 [1964] | N/A |
| JURISEVIC (Fran) | S postom kroz proslost istre i Slovenskog primorja [1981] | N/A |
| KAINZ (Christine) | Osterreichs post: vom botenposten zum postboten [1995] | N/A |
| KALIN (Rostivslav) | The Odessa post (fragments of history) edited by Vsevod Furman | N/A |
| KANE (W) | Undated Namestamps of Ireland 1823-1860 [1986] | N/A |
| KANE (W) | Uniform Fourpenny Post in Ireland [1989] | N/A |
| KANE (William | Handbook of Irish postal history to 1840 | N/A |
| KANTEY (B A) | The P.O.A. [post office agency] cancellations of Natal. [1982] | N/A |
| KANTEY (B A), | The postal markings of Natal | N/A |
| KARDOSCH (Velizar M) | The Principality of Serbia: postal history and postage stamps 1830-1882 [1996] | N/A |
| KAY (F George) | Royal Mail: the story of the posts in England from the time of Edward IVth to the present day [1951] | N/A |
| KAY (George K) compiler | Postal place names in Poland: a philatelic gazetteer [1992] | N/A |
| KAY (John L) | Pennsylvania postal history. [1976] | N/A |
| KEARNEY (Patrick N) | Japanese Occupation Postmarks of Malaya [1990] | WW2 |
| KEHR (Ernest A) | Egypt: the Posta Europea and the Kehr catalogue of interpostals [1864-1902] + suppt [1984] | N/A |
| KELL (Ronald) | The postal history of the district of Assiniboia 1882-1905 [1987] | N/A |
| KELLOW (Geoff) | Combination mail of British Post Offices abroad: an introductory survey [1992] | N/A |
| KELLY (Clyde) | United States postal policy [a history of the US postal services] [1931] | N/A |
| KELLY (Peter) | A study of the cancellations of bureaux de recette, facteurs boitiers, bureaux auxiliaires, 1876-1900 [1999] | N/A |
| KELLY (Peter) | An introduction to the postmarks and postal history relating to the rural and urban post: Origine rurale, Origine Locale, Marques des Facteurs, Boites Rurales, Boites Urbaines 1876-1900 [1999] | France, Local |
| KELLY (Peter) | Postal history of the railway on the island of Reunion 1882-1956 | Railways |
| KEMP (N P) | The postal service of the Isle of Man [1982] | N/A |
| KENDALL ( C) | Air Crash Mail of imperial Airways & Predecessor Airlines | N/A |
| KENEALLY (R.A.) | The First Slogan Cancellations of Great Britain 1917-1918 [nd] | Mechanisation |
| KENNEDY (Alistair) | The postal history of the British army in World War 1 [1977] | Military |
| KENNEDY-SKIPTON (Laetitia) | Elizabethan handwriting 1500-1650: a manual | N/A |
| KENT (Graeme) | The Post Office [1982] | N/A |
| KENTON (Phil J) | Crossroads at Panama: how the Panama railway came into being in 1855…[2000] | Railways |
| KENTON (Phil J) | Early routings of the Royal Mail Steam Packet Company 1842-1879 [1999] | Maritime |
| KENYA & UGANDA | Post Office Guide 1932 | N/A |
| KENYA, UGANDA & TANGANYIKA | Post Office Guide 1938 | N/A |
| KERL (Walter) | Die Deutschen portosatze: handbuch und tabellen 1872-1972 | N/A |
| KIDD (C) | Lancashire & Cheshire skeleton handstamps 1838-1982 | N/A |
| KIDD (Cyril) | Posted in advance for delivery on Christmas Day 1902-1909 [1974] | N/A |
