| Kaliningrad | Kaliningrad | Russia, Kaliningrad | -- | -- | | | |
| Komm. kinoen | Komm. kinoen | Norway, Steinkjer | 1952-03-07 | -- | 1952 | 1 | |
| Kinn | Kinn | Norway, Kinn, Florø | 2005-06-18 | -- | 2005 | 1 | |
| Karlskoga | Karlskoga | Sweden | 2002-09-05 | -- | 2002 | 1 | |
| Kongliga Stora Teatern | Kongliga Stora Teatern | Sweden, Stockholm, Gustav Adolfs torg 2 | 1876-11-11 | 1886-03-29 | 1876–1888 | 7 | |
| Konserthusteatern Karlskrona | Konserthusteatern Karlskrona | Sweden, Karlskrona, Stortorget 16 | 2010-12-09 | -- | 2010 | 1 | |
| Kornerhalle Schwechat | Kornerhalle Schwechat | Austria, Schwechat, Rathausplatz 6 | 2004-02-20 | -- | 2004 | 1 | |
| Königliches Theater Cassel | Königliches Theater Cassel | Germany, Kassel | 1878-08-24 | -- | 1878–1889 | 2 | |
| Krasnapolsky | Krasnapolsky | Netherlands, Amsterdam | 1938-03-20 | -- | 1938 | 1 | |
| Kulturhuset Hagelund | Kulturhuset Hagelund | Norway, Trysil, Storvegen 5 | 1978-12-02 | 2015-10-17 | 1978–2015 | 2 | |
| Katona József Színház | Katona József Színház | Hungary, Kecskemét, Katona József tér 5 | 1971-04-02 | 2007-05-05 | 1971–2007 | 2 | |
| Kråkstad, Samfunnshuset | Samfunnshuset Kråkstad (Kraakstad) | Norway, Kråkstad, Skolebakken 2A | 1956-10-20 | -- | 1956 | 1 | |
| Klicperovo divadlo (Studio Beseda) | Klicperovo divadlo (Studio Beseda) | Czech Republic, Hradec Králové, Dlouhá 99/9 | 1995-04-01 | -- | 1995 | 1 | |
| Kirkenes Videregående skole | Kirkenes Videregående skole | Norway, Kirkenes, Sor-Varanger | 1997-10-22 | -- | 1997–2015 | 2 | |
| Kurhaus (Großer Saal) | Kurhaus (Großer Saal) | Germany, Bad Soden am Taunus | 1963-11-06 | -- | 1963 | 1 | |
| Krasnodar | Krasnodar | Russia, Krasnodar | 1899-05-20 | -- | 1899 | 1 | |
| Kinoen, Longyearbyen | Kinoen, Longyearbyen | Norway, Svalbard | 1979-11-04 | -- | 1979 | 1 | |
| Kōtō kōkaidō tiara kōtō | Kōtō kōkaidō tiara kōtō (Tiara Koto) | Japan, Tokyo, 2 Chome-28-36 Sumiyoshi, Koto | 2006-10-14 | 2006-10-15 | 2006 | 1 | |
| Koninklijke Nederlandse Schouwburg | Koninklijke Nederlandse Schouwburg | Belgium, Antwerpen | 1918-01-19 | 1992-03-29 | 1918–1992 | 7 | |
| Kinoen | Kinoen | Norway, Verdal | 1961-02-14 | -- | 1961–1971 | 2 | |
| Koomesh Theater City Hall | Koomesh Theater City Hall | Iran, Semnan, Qods St, Semnan Province, Semnan | 2018-10-08 | 2020-02-20 | 2018–2020 | 2 | |
| Koninklijke Stadsschouwburg | Koninklijke Stadsschouwburg | Belgium, Kortrijk, Schouwburgplein 14 | 1978-11-10 | -- | 1978 | 1 | |
| Kärntner Grenzlandtheater Klagenfurt | Kärntner Grenzlandtheater Klagenfurt | Austria, Klagenfurt | 1942-01-09 | -- | 1942 | 1 | |
| Kjevik | Kjevik | Norway, Kjevik | 1971-02-26 | 1971-02-27 | 1971 | 2 | |
| Kardam (Arman) | Кардам (Kardam) | Bulgaria, Kardam | -- | -- | | | |
| Kleines Haus at Staatstheater Mainz | Kleines Haus at Staatstheater Mainz | Germany, Mainz, Tritonplatz | 1998-10-17 | 2001-06-28 | 1998–2001 | 2 | |
| Kongsberg Musikkteater | Kongsberg Musikkteater | Norway, Kongsberg, Hasbergs vei 36 | 2019-09-17 | 2019-10-11 | 2019 | 1 | |
| Kurhaus am Park | Kurhaus am Park | Germany, Isny, Schloßstraße 5 | 2006-02-19 | -- | 2006 | 1 | |
| Klagenfurt | Klagenfurt | Austria, Klagenfurt | -- | -- | | | |
| Kristiania Norske Theater | Kristiania Norske Theater | Norway, Oslo, Møllergata 1 | 1858-11-24 | 1859-04-13 | 1858–1859 | 3 | |
| Kulturhaus Dornbirn | Kulturhaus Dornbirn | Austria, Dornbirn | 1987-03-15 | -- | 1987–2006 | 2 | |
| Khedivial Opera House | Khedivial Opera House | Egypt, Cairo, EL Borg Gezira | 1892-03-15 | -- | 1892–1953 | 2 | |
| Krúdy Kamaraszínház | Krúdy Kamaraszínház | Hungary, Nyíregyháza, Bessenyei tér 13 | 1995-12-15 | -- | 1995–2007 | 2 | |
| Kyrkholmen | Kyrkholmen, Skellefteå | Sweden, Kyrkholmen, Skellefteå, Kyrkholmen | 1997-06-18 | 1997-07-13 | 1997 | 1 | |
| Kvinnemuseet | Kvinnemuseet | Norway, Kongsvinger, 2211 Kongsvinger | 2002-08-29 | 2002-09-13 | 2002 | 1 | |
| Královské zemské České divadlo | Královské zemské České divadlo | Czech Republic, Prague | 1878-04-15 | -- | 1878 | 1 | |
| Klyve ungdomsskole | Klyve ungdomsskole | Norway, Skien | 2006-03-02 | -- | 2006 | 2 | |
| Kaimscher Konzertsaal | Kaimscher Konzertsaal | Germany, Munich, Türkenstraße 5 | 1896-02-27 | -- | 1896 | 1 | |
| Kazalište Marina Držiča | Kazalište Marina Držiča | Croatia, Dubrovnik, Pred Dvorom 3 | -- | -- | | 1 | |
| Kinimatografos Apollon | Kinimatografos Apollon | Greece, Livadeia | 1981-11-11 | -- | 1981 | 1 | |
| Kinderspace | Kinderspace | Japan, Tokyo | -- | -- | | | |
| Kyrenia | Kyrenia | Cyprus, Kyrenia | 1973-03-06 | -- | 1973–1974 | 2 | |
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