| Koninklijke Stadsschouwburg | Koninklijke Stadsschouwburg | Belgium, Kortrijk, Schouwburgplein 14 | 1978-11-10 | -- | 1978 | 1 | |
| Koninklijke Vlaamse Schouwburg | Koninklijke Vlaamse Schouwburg | Belgium, Bruxelles, Quai aux Pierres de Taille 7 | 1975-05-21 | 1990-06-10 | 1975–1990 | 3 | |
| Konserthusteatern Karlskrona | Konserthusteatern Karlskrona | Sweden, Karlskrona, Stortorget 16 | 2010-12-09 | -- | 2010 | 1 | |
| Kontraskjæret | Kontraskjæret | Norway, Oslo, Oslo | 2012-08-25 | -- | 2012 | 1 | |
| Konzert Theater Coesfeld | Konzert Theater Coesfeld | Germany | 2012-03-07 | 2012-03-07 | 2012 | 1 | |
| Konzert und Festhalle | Konzert und Festhalle | Germany, Wörth/Rhein | 1980-03-19 | -- | 1980 | 1 | |
| Konzert- und Theatersaal, Nordhorn | Konzert- und Theatersaal, Nordhorn | Germany, Nordhorn, Ootmarsumer Weg 14 | 2010-03-12 | -- | 2010–2018 | 2 | |
| Konzert-Aula Kamen | Konzert-Aula Kamen | Germany, Kamen, Hammer Str. 19 | 2001-02-19 | -- | 2001 | 1 | |
| Konzerthaus Ravensburg | Konzerthaus Ravensburg | Germany, Ravensburg, Wilhelmstraße 3 | 2001-04-04 | -- | 2001 | 1 | |
| Koomesh Theater City Hall | Koomesh Theater City Hall | Iran, Semnan, Qods St, Semnan Province, Semnan | 2018-10-08 | 2020-02-20 | 2018–2020 | 2 | |
| Kopervik | Kopervik | Norway, Kopervik | 1971-03-05 | -- | 1971–2004 | 4 | |
| Koppang | Koppang | Norway, Koppang | -- | -- | | | |
| Korgen | Korgen | Norway, Korgen | -- | -- | | | |
| Koriyama | Koriyama | Japan, Koriyama | -- | -- | | | |
| Korjaamo Teatteri | Korjaamo Teatteri | Finland, Helsinki, Töölönkatu 51 a-b | 2016-08-23 | 2016-08-24 | 2016 | 1 | |
| Kornerhalle Schwechat | Kornerhalle Schwechat | Austria, Schwechat, Rathausplatz 6 | 2004-02-20 | -- | 2004 | 1 | |
| Korsavadshallen | Korsavadshallen | Sweden, Simrishamn, Backgatan 50 | 2006-10-25 | -- | 2006 | 1 | |
| Korshch Teatr | Korshch Teatr | Russia, Moscow | 1892-01-01 | -- | 1892–1904 | 2 | |
| Korskirken | Korskirken | Norway, Bergen, Vågsbunnen | 2008-02-13 | 2008-02-14 | 2008 | 1 | |
| Korsør Theater | Korsør Theater | Denmark, Korsør | 1902-11-11 | -- | 1902–1907 | 3 | |
| Kortrijk | Kortrijk | Belgium, Kortrijk | 1995-01-24 | -- | 1995 | 1 | |
| Košice | Košice | Slovak Republic, Košice | 1889-12-21 | 1928-09-22 | 1889–1940 | 13 | |
| Kostroma | Kostroma | Russia, Kostroma | 1902-- | -- | 1902 | 1 | |
| Kostromskoj dramatieeskij teatr imeni A. Ostrovskogo | Kostromskoj dramatieeskij teatr imeni A. Ostrovskogo | Russia, Kostroma | 1964-10-27 | -- | 1964 | 1 | |
| Koszalin | Koszalin | Poland, Koszalin | -- | -- | | | |
| Kota Larantuka | Kota Larantuka | Indonesia, Larantuka East Flores Regency Nusa Tenggara Timur | 2019-06-23 | 2019-07-06 | 2019 | 1 | |
| Kotka | Kotka | Finland, Kotka | -- | -- | | | |
| Kotkan Kaupunginteatteri | Kotkan Kaupunginteatteri | Finland, Kotka, Keskuskatu 15 | 1938-03-12 | 2006-12-14 | 1938–2012 | 9 | |
| Kotkan Kaupunginteatteri (Studio) | Kotkan Kaupunginteatteri (Studio) | Finland, Kotka | 1982-03-27 | -- | 1982 | 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 | |
| Kotsøy | Kotsøy (Kotsoey) | Norway, Kotsøy | 1971-04-26 | -- | 1971 | 1 | |
| Kraevoj teatr drami | Kraevoj teatr drami | Russia, Habarovsk | 1955-10- | -- | 1955 | 1 | |
| Kragerø | Kragerø | Norway, Kragerø | 1889-02-20 | 1889-02-25 | 1889–1958 | 3 | |
| Kragerø kirke | Kragerø kirke | Norway, Kragerø | 2016-11-03 | -- | 2016 | 1 | |
| Kragerø ungdomsskole | Kragerø ungdomsskole | Norway, Kragerø, Kragerø | 2006-10-30 | 2006-10-31 | 2006 | 1 | |
| Krajské divadlo Kolín | Krajské divadlo Kolín | Czech Republic, Kolín | 1976-04-30 | -- | 1976 | 1 | |
| Krajské krušnohorské divadlo Teplice | Krajské krušnohorské divadlo Teplice | Czech Republic, Teplice | 1958-02-23 | -- | 1958 | 1 | |
| Krajské oblastní divadlo | Krajské oblastní divadlo | Czech Republic, Karlovy Vary | 1956-01-21 | -- | 1956 | 1 | |
| Krajské oblastní divadlo Hradec Králové | Krajské oblastní divadlo Hradec Králové | Czech Republic, Hradec Králové | 1960-04-09 | -- | 1960 | 1 | |
| Kraljevsko slovensko gledališče Ljubljana | Kraljevsko slovensko gledališče Ljubljana | Slovenia, Ljubljana | 1919-03-08 | -- | 1919 | 1 | |
| Královské zemské České divadlo | Královské zemské České divadlo | Czech Republic, Prague | 1878-04-15 | -- | 1878 | 1 | |
| Kramfors | Kramfors | Sweden, Kramfors | 1991-04-08 | 1991-04-08 | 1991 | 1 | |
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