| Königliches Theater Cassel | Königliches Theater Cassel | Germany, Kassel | 1878-08-24 | -- | 1878–1889 | 2 | |
| Kiln Theatre | Kiln Theatre | England, London, 269 Kilburn High Rd | 2019-05-30 | 2019-07-06 | 2019 | 1 | |
| Kansai Geijutsuza | Kansai Geijutsuza (Kansai Geijutsuza Studio) | Japan, Osaka | 1958-11-19 | -- | 1958 | 1 | |
| Kreiskulturraum | Kreiskulturraum | Germany, Kronach, Siechenangerstraße 13 | 2002-11-15 | 2002-11-17 | 2002 | 1 | |
| Korskirken | Korskirken | Norway, Bergen, Vågsbunnen | 2008-02-13 | 2008-02-14 | 2008 | 1 | |
| Kelly's Theatre | Kelly's Theatre | England, Liverpool, Paradise Street | 1910-09-26 | -- | 1910 | 3 | |
| Korsavadshallen | Korsavadshallen | Sweden, Simrishamn, Backgatan 50 | 2006-10-25 | -- | 2006 | 1 | |
| Kirchgemeindehaus Langnau | Kirchgemeindehaus Langnau | Switzerland, Langnau im Emmental, Dorfbergstrasse 2, | 1992-03-12 | 1992-03-21 | 1992 | 1 | |
| Kneževo | Kneževo | Bosnia and Herzegovina | -- | -- | | | |
| Kulturhuset Halmstad | Kulturhuset Halmstad | Sweden, Halmstad, Furuvägen 41 | 2010-11-27 | -- | 2010 | 1 | |
| Kulturzentrum Güssing | Kulturzentrum Güssing | Austria, Güssing, Schulstraße 6 | 2004-02-28 | -- | 2004 | 1 | |
| Kiskunfélegyháza | Kiskunfélegyháza | Hungary, Kiskunfélegyháza | 1922-04-03 | -- | 1922–1924 | 2 | |
| Koninklijke Nederlandse Schouwburg | Koninklijke Nederlandse Schouwburg | Belgium, Antwerpen | 1918-01-19 | 1992-03-29 | 1918–1992 | 7 | |
| Kecskemét | Kecskemét | Hungary, Kecskemét | 1909-03-06 | -- | 1909–2007 | 14 | |
| Kråkstad, Samfunnshuset | Samfunnshuset Kråkstad (Kraakstad) | Norway, Kråkstad, Skolebakken 2A | 1956-10-20 | -- | 1956 | 1 | |
| Kjevik | Kjevik | Norway, Kjevik | 1971-02-26 | 1971-02-27 | 1971 | 2 | |
| Kherson | Kherson | Ukraine, Kherson | 1902-11-29 | 1904-01-27 | 1902–1904 | 6 | |
| Kurtheater | Kurtheater | Germany, Bad Kissingen, Theaterplatz | 1997-10-26 | 1997-10-26 | 1997–2018 | 5 | |
| Kulturzentrum Brotfabrik Bonn | Kulturzentrum Brotfabrik Bonn | Germany, Bonn | 2016-05-12 | 2016-10-29 | 2016 | 1 | |
| Komárom | Komárom | Hungary, Komárom | 1925-03-25 | -- | 1925–1935 | 2 | |
| Komm. kinoen | Komm. kinoen | Norway, Steinkjer | 1952-03-07 | -- | 1952 | 1 | |
| KVS Box | KVS Box | Belgium, Brussels, 9 Quai aux Pierres de Taille | 2005-03-03 | 2005-03-06 | 2005 | 1 | |
| Komödie | Komödie | Austria, Vienna, Franz-Josefs-Kai 29 | 1947-11-25 | -- | 1947–1950 | 3 | |
| Kjølnes ungdomsskole | Kjølnes ungdomsskole | Norway, Porsgrunn, Porsgrunn | 2005-11-01 | 2006-11-14 | 2005–2006 | 2 | |
| Kath. Pfarrzentrum | Kath. Pfarrzentrum | Germany, Ueberlingen | 1980-03-15 | -- | 1980 | 1 | |
| Kulturzentrum Großenhain | Kulturzentrum Großenhain | Germany, Grossenhain | 2009-01-18 | -- | 2009 | 1 | |
| Košice | Košice | Slovak Republic, Košice | 1889-12-21 | 1928-09-22 | 1889–1940 | 13 | |
| Koninklijke Schouwburg | Koninklijke Schouwburg | Netherlands, The Hague, Korte Voorhout 3 | 1929-05-19 | 2013-02-26 | 1929–2017 | 26 | |
| Kurhaus am Park | Kurhaus am Park | Germany, Isny, Schloßstraße 5 | 2006-02-19 | -- | 2006 | 1 | |
| K3N Stadthalle Nürtingen | K3N Stadthalle Nürtingen | Germany, Nürtingen, Heiligkreuzstraße 4 | 2009-02-02 | -- | 2009–2015 | 2 | |
| Kulturfabriken | Kulturfabriken, Liljeholmen | Sweden, Stockholm, Liljeholmen | 1997-03-01 | -- | 1997 | 1 | |
| Kruisboog Cultural Center | Kruisboog Cultural Center | Belgium, Tienen, Minderbroedersstraat 15 | 1998-11-19 | -- | 1998–2007 | 2 | |
| Kokkolan Kaupunginteatteri | Kokkolan Kaupunginteatteri | Finland, Kokkola, Torikatu | 1921-08-23 | 1952-- | 1921–1983 | 3 | |
| Kyrenia | Kyrenia | Cyprus, Kyrenia | 1973-03-06 | -- | 1973–1974 | 2 | |
| Krasnodarski molodežnjij teatr | Krasnodarski molodežnjij teatr (Krasnodar Youth Theater) | Russia, Krasnodar, Krasnodar Krai, Ulitsa Mitrofana Sedina, 28 | 2016-10-06 | -- | 2016 | 1 | |
| Königliches Theater Helgoland (Hoftheater-Ensemble) | Königliches Theater Helgoland (Hoftheater-Ensemble) | Germany, Helgoland | 1878-04-14 | -- | 1878 | 1 | |
| Kinoen | Kinoen | Norway, Verdal | 1961-02-14 | -- | 1961–1971 | 2 | |
| Kilden | Kilden | Norway, Tønsberg | 1960-03-23 | 1963-03-13 | 1960–1965 | 4 | |
| Krasnapolsky | Krasnapolsky | Netherlands, Amsterdam | 1938-03-20 | -- | 1938 | 1 | |
| Klubhaus i Berlin-Spandau | Klubhaus i Berlin-Spandau | Germany, Berlin, Westerwaldstr. 13 | 2002-09-20 | 2002-10-06 | 2002 | 1 | |
| Knickerbocker Theatre | Knickerbocker Theatre | United States of America, New York, 1396 Broadway (West 38th Street) | 1905-03-07 | 1905-03- | 1905 | 1 | |
| Kirkebygden Skole | Kirkebygden Skole | Norway, Enebakk, Enebakk | 2005-11-02 | -- | 2005 | 1 | |
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