| Record Number | Keyword(s) | Country | Catalog Listed? | Continent | |
| 1127 | I GILDA (overprint) | Iceland, restoring postal validity (1902) [In Validity]. | Real | Europe |  |
| 1128 | I POLSKA WYSTAWA MAREK (overprint) | Poland, semipostals [White Cross Society]. | Real | Europe |  |
| 1129 | I. A. (overprint) | South Australia, officials (1868-74) [Immigration Agent]. | Real | Australia |  |
| 1130 | I. E. (overprint) | South Australia, officials (1868-74) [Intestate Estates]. | Real | Australia |  |
| 1131 | I. S. (overprint) | South Australia, officials (1868-74) [Inspector of Sheep]. | Real | Australia |  |
| 1132 | I.B. | West Irian (1970). | Real | Australia |  |
| 1133 | I.E.F. "D" (overprint on stamps of Turkey) | Mesopotamia (1919). | Real | Asia |  |
| 1134 | I.E.F. (overprint) | India, military stamps (1914) [India Expeditionary Force]. | Real | Asia |  |
| 1135 | I.O.V.R. | Romania, postal tax stamps (1948). | Real | Europe |  |
| 1136 | I.P.N. (overprint) | India, fiscal commission on due notes [Indian Postal Note]. | Real | Asia | |
| 1137 | I.R. (overprint) | U.S. Internal Revenue issues. | Real | Americas |  |
| 1138 | I.R. OFFICIAL (overprint) | Great Britain, officials (1882-1904) [Inland Revenue]. | Real | Europe |  |
| 1139 | ICC (overprint) | India- Int. Commission on Indo-China (1965-8). | Real | Asia |  |
| 1140 | ICCR | International Council of City Republics. | Not Scott Listed | none | |
| 1141 | IDAR | India- Idar (1939-44). | Real | Asia |  |
| 1142 | IDROVOLANTE (overprint) | Italy, hydroplane airmail (1917) [By Hydroplane]. | Real | Europe |  |
| 1143 | IERUSALEM (overprint on stamps of Russia) | Russia- Offices in Turkey- Jerusalem (1909-10). | Real | Asia |  |
| 1144 | IKAPIAS | Icaria. | Real | Europe |  |
| 1145 | ILE BARBE | France fantasy stamps by A. Bourdi. | Not Scott Listed | Europe |  |
| 1146 | ILE ROUAD | Rouad. | Real | Asia |  |
| 1147 | ILE ROUAD (overprint on stamps of French Levant) | Rouad (1916). | Real | Asia |  |
| 1148 | ILE ROY | France restaurant fantasy. | Not Scott Listed | Europe | |
| 1149 | ILES DES SOURDS (ISLANDS OF THE DEAF) | Donald Evans issue, tropical archipelago. | Not Scott Listed | none |  |
| 1150 | ILES WALLIS ET FUTUNA | Wallis & Futuna Islands. | Real | Australia |  |
| 1151 | ILES WALLIS ET FUTUNA (overprint on stamps of New Caledonia) | Wallis & Futuna Islands. (1920-40). | Real | Australia |  |
| 1152 | IMPER. REG POSTA AUSTR | Austria, Offices in Turkey (1883-6). | Real | Europe |  |
| 1153 | IMPERIAL BRITISH EAST AFRICA COMPANY | British East Africa. | Real | Africa |  |
| 1154 | IMPERIO COLONIAL PORTUGUES (no colony name) | Portuguese Africa, postage dues, 1945. | Real | Africa |  |
| 1155 | IMPERIO DO BRASIL | Brazil (1887-8) [Empire of Brazil]. | Real | Americas |  |
| 1156 | IMPERIO MEXICANO | Mexico (1866) [Empire of Mexico]. | Real | Americas |  |
| 1157 | IMPERIUM | Queen Victoria essays produced by De la Rue & Company. Ltd. as samples with no specific country named. | Not Scott Listed | None |  |
| 1158 | IMPRESOS | Cuba, Philippines, newspaper stamps [Prints]. | Real | Americas | |
| 1159 | IMPRIME (overprint) | Turkey, newspaper stamps [Printed]. | Real | Asia | |
| 1160 | IMPRIMES (overprint) | Iran, newspaper stamps [Printed]. | Real | Asia | |
| 1161 | IMPTO DE GUERRA | Spain, war tax stamps (1874-98) [War Tax]. | Real | Europe |  |
| 1162 | IMPUESTO | Chile, revenues used as postage [Tax]. | Real | Americas | |
| 1163 | IMPUESTO DE ENCOMIENDAS | Uruguay, parcel posts. | Real | Americas |  |
| 1164 | IMPUESTO DE GUERRA | Spain, war tax stamps (1874-98) [War Tax]. | Real | Europe |  |
| 1165 | INCHI YA ETAT DU KATANGA | Katanga, rebellion against the Belgian Congo. | Real | Africa |  |
| 1166 | iNCi YIL DONUMU | Turkey. | Real | Asia | |
| 1167 | INDE | French India. | Real | Asia | |
| 1168 | INDIA (with Portuguese or words REIS, REAL, TANGAS or RUPIA) | Portuguese India. | Real | Asia |  |
| 1169 | INDIA PORT. | Portuguese India (1871-86). | Real | Asia |  |
| 1170 | INDIA PORTUGUEZA | Portuguese India (1887-95). | Real | Asia |  |
| 1171 | INDIE | French India. | Real | Asia | |
| 1172 | INDO-CHINE | Indo-China. | Real | Asia | |
| 1173 | INDOMALAYSIA | Punch magazine cover parody. | Not Scott Listed | Asia | |
| 1174 | INDONESIA (not preceded by REPUBLIK) | Netherlands Indies. | Real | Asia |  |
| 1175 | INDONESIA REPUBLIK | Indonesia. | Real | Asia |  |
| 1176 | INDORE | India- Indore (1904-47). | Real | Asia |  |
| 1177 | INDUSTRIELLE KRIEGSWIRTSCHAFT | Switzerland War Board of Trade officials (1918). | Real | Europe |  |
| 1178 | INGOLF | Overprints on U.S. stamps somewhere in the Atlantic, may be a ship marking. | Not Scott Listed | Americas | |
| 1179 | INHAMBANE (overprint on stamps of Mozambique) | Inhambane (1894-5). | Real | Africa |  |
| 1180 | INKERI | North Ingermanland (1920). | Real | Europe |  |
| 1181 | INLAND (on stamp with no country name) | Liberia. | Real | Africa |  |
| 1182 | INSELPOST (overprint) | Germany, military stamps. | Real | Europe | |
| 1183 | INSTRUCAO D.L. No. 7 de 3-2-34 (overprint on war tax stamps of Portuguese India) | Timor, postal tax stamps (1934-5). | Real | Americas |  |
| 1184 | INSTRUCCION | Venezuela, fiscal stamps. | Real | Americas | |
| 1185 | INSTRUCCION SELLO PROVISIONAL CARUPANO 1902 | Venezuela- Carupano (1902). | Real | Americas |  |
| 1186 | INSUFFICIENTLY PREPAID POSTAGE DUE | Zanzibar (1931-33). | Real | Africa |  |
| 1187 | INTERSOL, KINGDOM OF | Stamps created to advertise book "Musrum." | Not Scott Listed | none | |
| 1188 | IONIKON KPATOΣ | Ionian Islands [Ionian Government]. | Real | Europe |  |
| 1189 | IRANIENNES | Iran (1935-7). | Real | Asia |  |
| 1190 | IRANQ | Supposed federation of Iran and Iraq, spoof issue. | Not Scott Listed | Asia |  |
| 1191 | IRAQ (overprint on stamps of Turkey) | Mesopotamia (1918-22). | Real | Asia | |
| 1192 | IRELAND, FREE | Propaganda labels for a united Ireland produced by Price & Co. of Ireland. | Not Scott Listed | Europe | |
| 1193 | IRIAN BARAT | West Irian (New Guinea) (1963-8). | Real | Australia |  |
| 1194 | IROQUOIS FEDERATION | Parody or spoof from Punch magazine. | Not Scott Listed | none | |
| 1195 | ISLA DE MAS AFUERA | Chile overprints. | Not Scott Listed | Americas |  |
| 1196 | ISLAND | Iceland. | Real | Europe |  |
| 1197 | ISLAS DE JUAN FERNANDEZ | Chile- Juan Fernandez Islands, also seeing general use (1910). | Real | Americas |  |
| 1198 | ISLAS GALAPAGOS | Ecuader- Galapagos Islands. | Real | Americas |  |
| 1199 | ISO | Swedish island in Baltic Sea, a bogus and speculative local. | Not Scott Listed | Europe | |
| 1200 | ISOLE ITALIANE DELL'EGEO (overprint on stamps of Italy) | Italy- Aegean Islands (1930-40). | Real | Europe |  |
| 1201 | ISOLE JONIE (overprint on stamps of Italy) | Ionian Islands- Italian occupation (1941). | Real | Europe |  |
| 1202 | ISTRA SLOVENSKO PRIMORJE | Yugoslavia, issues for Istria and the Slovene Coast (1946). | Real | Europe |  |
| 1203 | ISTRIA | Jugoslavia. | Not Scott Listed | Europe |  |
| 1204 | ISTRIA LITTORALE SLOVENO | Yugoslavia, issues for Istria and the Slovene Coast (1946). | Real | Europe |  |
| 1205 | ITA-KARIALA (overprint on stamps of Finland) | Karelia, Finnish military administration (1941-?). | Real | Europe |  |
| 1206 | ITALIA | Italy. | Real | Europe |  |
| 1207 | ITALIA OCCUPAZIONE MILITARE ITALIANA ISOLE CEFALONIA E ITACA (overprint on stamps of Greece) | Ionian Islands- Italian occupation. | Real | Europe |  |
| 1208 | ITALIAN SOMALILAND | Somalia. | Real | Africa |  |
| 1209 | ITALIANE | Italy. | Real | Europe |  |
| 1210 | ITALIANO | Italy. | Real | Europe |  |
| 1211 | IVIGUT | Bogus local post from Greenland. | Not Scott Listed | Americas | |
| 1212 | IZMIR HIMAYEIETFAL CEMIYETI | Turkey, tax stamps (1933). | Real | Asia | |
| 3495 | Iceland | Iceland (stamp issuing country) 1873 - | Real | Europe |  |
| 3496 | Ichang | Ichang (stamp issuing country) 1894 - | Real | Asia |  |
| 3498 | Idar | Idar (stamp issuing country) 1939 - 1950 | Real | Asia |  |
| 3499 | Ifni | Ifni (stamp issuing country) 1941 - 1969 | Real | Australia |  |
| 3500 | Ikaria | Ikaria (stamp issuing country) 1912 - 1913 | Real | Europe |  |
| 3501 | Ile Rouad | Ile Rouad (stamp issuing country) 1916 - 1921 | Real | Asia |  |
| 3502 | Imperial Germany | Imperial Germany (stamp issuing country) 1872 - 1919 | Real | Europe |  |
| 3503 | India | India (stamp issuing country) 1852 - | Real | Asia |  |
| 3504 | Indian Expeditionary Forces | Indian Expeditionary Forces (stamp issuing country) 1914 - 1922 | Real | Asia |  |
| 3505 | IndoChina | IndoChina (stamp issuing country) 1889 - 1949 | Real | Asia |  |
| 3506 | IndoChina (Indian Forces) | IndoChina (Indian Forces) (stamp issuing country) 1954 - 1968 | Real | Asia |  |
| 3507 | Indonesia | Indonesia (stamp issuing country) 1945 - | Real | Asia |  |
| 3508 | Indore | Indore (stamp issuing country) 1886 - 1950 | Real | Asia |  |
| 3509 | Inhambane | Inhambane (stamp issuing country) 1895 - 1920 | Real | Africa |  |
| 3510 | Inini | Inini (stamp issuing country) 1932 - 1946 | Real | Africa |  |
| 3511 | Inner Mongolia (Japanese Occupation) | Inner Mongolia (Japanese Occupation) (stamp issuing country) 1941 - 1943 | Real | Asia |  |
| 3512 | Ionian Islands | Ionian Islands (stamp issuing country) 1859 - 1864 | Real | Europe |  |
| 3513 | Ionian Islands (Italian Occupation) | Ionian Islands (Italian Occupation) (stamp issuing country) 1941 - 1943 | Real | Europe |  |
| 3514 | Iran | Iran (stamp issuing country) 1935 - | Real | Asia |  |
| 3515 | Iraq | Iraq (stamp issuing country) 1923 - | Real | Asia |  |
| 3516 | Iraq (British Occupation) | Iraq (British Occupation) (stamp issuing country) 1918 - 1923 | Real | Asia |  |
| 3517 | Ireland | Ireland (stamp issuing country) 1922 - | Real | Europe |  |
| 3519 | Isle of Man | Isle of Man (stamp issuing country) 1973 - | Real | Europe |  |
| 3520 | Israel | Israel (stamp issuing country) 1948 - | Real | Asia |  |
| 3521 | Istria (Yugoslav Occupation) | Istria (Yugoslav Occupation) (stamp issuing country) 1945 - only | Real | Europe |  |
| 3522 | Italian Colonies (General Issues) | Italian Colonies (General Issues) (stamp issuing country) 1932 - 1934 | Real | Europe |  |
| 3523 | Italian East Africa | Italian East Africa (stamp issuing country) 1938 - 1941 | Real | Africa |  |
| 3524 | Italian Occupation: postal administration | Italian Occupation: postal administration (stamp issuing country) 1911 - 1943 | Real | Europe | |
| 3525 | Italian Post Offices in the Turkish Empire | Italian Post Offices in the Turkish Empire (stamp issuing country) 1873 - 1923 | Real | Asia |  |
| 3526 | Italian Social Republic | Italian Social Republic (stamp issuing country) 1944 - 1945 | Real | Europe |  |
| 3527 | Italian Somaliland | Italian Somaliland (stamp issuing country) 1905 - 1936 | Real | Africa |  |
| 3528 | Italy | Italy (stamp issuing country) 1862 - | Real | Europe |  |
| 3530 | Italy (Austrian Occupation) | Italy (Austrian Occupation) (stamp issuing country) 1918 - only | Real | Europe |  |
| 3531 | Ivory Coast (French Colony) | Ivory Coast (French Colony) (stamp issuing country) 1892 - 1944 | Real | Africa |  |
| 4200 | Intern Mustermesse in Ljubljana Jugoslavien | Ljubljana Fair Cinderellas 1921-1955 | Not Scott Listed | Europe |  |