| Izmail | Izmail | Ukraine, Izmail | -- | -- | | | |
| Irazee | Irazee | United States of America, Irazee | -- | -- | | | |
| Iaşi | Iaşi | Romania, Iaşi | -- | -- | | | |
| Iacobeni | Iacobeni | Romania, Iacobeni | -- | -- | | | |
| Immenstadt | Immenstadt | Germany, Immenstadt | -- | -- | | | |
| Islington | Islington | England, London | -- | -- | | | |
| Ianca | Ianca | Romania, Ianca | -- | -- | | | |
| Ipswich | Ipswich | England, Ipswich | -- | -- | | | |
| Ida Aalbergin kiertue | Ida Aalbergin kiertue | Finland | -- | -- | | | |
| Iitti | Iitti | Finland, Iitti | -- | -- | | | |
| Ineu | Ineu | Romania, Ineu | -- | -- | | | |
| Ion Caramitru Hall | Ion Caramitru Hall | Romania, Bucharest | -- | -- | | | |
| Ileana | Ileana | Romania, Ileana | -- | -- | | | |
| Ibsen Theatre | Ibsen Theatre | United States of America, New York | 1935-04-01 | -- | 1935 | 1 | |
| Idrettshallen, Risør | Risør idrettshall | Norway, Risør | 1975-03-17 | -- | 1975 | 1 | |
| Irondale Center | Irondale Center | United States of America, Brooklyn, 85 South Oxford Street | 2022-10-05 | 2022-11-20 | 2022 | 1 | |
| Illnau-Effretikon ZH | Illnau-Effretikon ZH | Switzerland | 2002-11-16 | -- | 2002 | 1 | |
| IOGT-huset | IOGT-huset | Norway, Bergen, Sverresgate 1 | 1990-02-08 | 1990-02-14 | 1990 | 1 | |
| ILAII - Artes escénicas | ILAII - Artes escénicas | Mexico, Mérida, Calle 13 #94 | 2024-08-30 | 2024-08-31 | 2024 | 1 | |
| Iowa City Community Theatre | Iowa City Community Theatre | United States of America, Iowa City, 4261 Oak Crest Hill Rd SE | 2005-03-04 | 2005-03-20 | 2005 | 1 | |
| International Theatre | International Theatre | United States of America, New York | 1946-11-12 | 1947-02-19 | 1946 | 1 | |
| Inderøy Kulturhus | Inderøy Kulturhus | Norway, Sakshaug | 1993-03-11 | -- | 1993 | 1 | |
| Inkonst | Inkonst | Sweden, Malmö, Bergsgatan 29 | 2006-09-29 | 2006-10-01 | 2006 | 1 | |
| Imperial Theatre | Imperial Theatre | Canada, Vancouver | 1908-07-09 | 1908-07-09 | 1908 | 1 | |
| IGS Garbsen | IGS Garbsen | Germany, Garbsen, Meyenfelder Str. 8, | 2010-10-30 | -- | 2010 | 1 | |
| Interzona | Interzona | Italy, Verona, Via Santa Teresa, 6 | 1999-10-07 | -- | 1999 | 1 | |
| Innsjön | Innsjön | Sweden, Innsjön | 1911-07-03 | 1911-07-04 | 1911 | 1 | |
| Institut Méditerranéen des Métiers du Spectacle - IMMS | Institut Méditerranéen des Métiers du Spectacle - IMMS | France, Marseille, 41 rue Jobin | 2017-04-11 | 2017-04-15 | 2017 | 1 | |
| Ingeborg-Drewitz-Bibliothek | Ingeborg-Drewitz-Bibliothek | Germany | 2023-08-31 | 2023-08-31 | 2023 | 1 | |
| Indiana Repertory Theatre | Indiana Repertory Theatre | United States of America, Indianapolis, 140 W. Washington Street | 2001-01-09 | 2001-02-03 | 2001 | 1 | |
| Imperial Theatre | Imperial Theatre | United States of America, New York, 249 W 45th St | 1924-05-01 | -- | 1924 | 1 | |
| International Festival of Monodrama | International Festival of Monodrama | Ukraine, Kiev | 2006-09-23 | -- | 2006 | 1 | |
| Idrettshallen på Tråstad skole | Idrettshallen på Tråstad skole | Norway, Kongsvinger | 1971-09-29 | 1971-09-29 | 1971 | 1 | |
| Isbjørnhallen | Isbjørnhallen | Norway, Hammerfest, Meridiangata 8 | 1997-11-05 | 1997-11-06 | 1997 | 1 | |
| Instituto LING | Instituto LING | Brazil, Porto Alegre, R. João Caetano, 440 | 2018-05-17 | 2018-05-26 | 2018 | 1 | |
| Istindportalen | Istindportalen | Norway, Heggelia, Kapellveien 2 | 2007-03-12 | -- | 2007 | 1 | |
| Imperial Theatre | Imperial Theatre | United States of America, Saint-Louis | 1904-11-17 | 1904-11-17 | 1904 | 1 | |
| Iberoamericano de Teatro de Bogotá | Iberoamericano de Teatro de Bogotá | Colombia, Bogotá, Cundinamarca, Carrera 19 # 37-53 | 2008-03-07 | 2008-03-10 | 2008 | 1 | |
| Ibestad Samfunnshus | Ibestad Samfunnshus | Norway, Hamnvik, 9450 Hamnvik | 1970-02-28 | -- | 1970 | 1 | |
| Ilkley Playhouse | Ilkley Playhouse | England, Ilkley | 2024-09-12 | 2024-09-21 | 2024 | 1 | |
| Innsbrucker Kellertheater | Innsbrucker Kellertheater | Austria, Innsbruck, Adolf-Pichler-Platz 8 | 2004-10-20 | 2004-11-30 | 2004 | 1 | |
| International House Theater | International House Theater | United States of America, Chicago | 1934-03-16 | 1934-03-17 | 1934 | 1 | |
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