| Krasnodarski molodežnjij teatr | Krasnodarski molodežnjij teatr (Krasnodar Youth Theater) | Russia, Krasnodar, Krasnodar Krai, Ulitsa Mitrofana Sedina, 28 | 2016-10-06 | -- | 2016 | 1 | |
| Kungsör | Kungsör | Sweden, Kungsör | 1993-10-15 | -- | 1993 | 1 | |
| Kennington Theatre | Kennington Theatre | England, London, Kennington Park Road | 1917-06-12 | -- | 1917 | 1 | |
| Kleines Haus at Staatstheater Mainz | Kleines Haus at Staatstheater Mainz | Germany, Mainz, Tritonplatz | 1998-10-17 | 2001-06-28 | 1998–2001 | 2 | |
| Kinosalen | Kinosalen | Norway, Orkanger | 1989-11-01 | -- | 1989–1993 | 2 | |
| Karcag | Karcag | Hungary, Karcag | -- | -- | | | |
| Kneževo | Kneževo | Bosnia and Herzegovina | -- | -- | | | |
| Kjevik | Kjevik | Norway, Kjevik | 1971-02-26 | 1971-02-27 | 1971 | 2 | |
| Kantonsschule Kollegium Schwyz | Kantonsschule Kollegium Schwyz | Switzerland, Schwyz, Kollegiumstrasse 24 | 2011-02-18 | 2011-02-26 | 2011 | 1 | |
| Kom Hoorn | Kom Hoorn | Netherlands, Terschelling | 2003-06-13 | 2003-08-14 | 2003 | 1 | |
| Kongsberg, Kinoen | Kinoen Kongsberg | Norway, Kongsberg, Nymoens Torg 3 | 1969-08-27 | -- | 1969–1984 | 8 | |
| Kleist-Theater | Kleist-Theater | Germany, Frankfurt an der Oder, Gerhart-Hauptmann Strasse | 1994-04-23 | -- | 1994 | 1 | |
| Kragerø | Kragerø | Norway, Kragerø | 1889-02-20 | 1889-02-25 | 1889–1958 | 3 | |
| Kulturpfad Essen | Kulturpfad Essen | Germany, Essen | 2006-06-23 | -- | 2006 | 1 | |
| Kyrenia | Kyrenia | Cyprus, Kyrenia | 1973-03-06 | -- | 1973–1974 | 2 | |
| Kid Ailac Art Hall | Kid Ailac Art Hall (Kid Ailack Art Hall) | Japan, Tokyo, 2-43 Matsubara, Setagaya-ku | 1998-06-20 | 1998-06-21 | 1998 | 1 | |
| Kingsway Theatre | Kingsway Theatre | England, London, Little Queen Street | 1911-04-22 | 1928-03-23 | 1911–1928 | 7 | |
| Karuss skole | Karuss skole | Norway, Kristiansand, Kristiansand | 2006-10-19 | -- | 2006 | 1 | |
| Kantiforum | Kantiforum | Switzerland, Wohlen, Allmendstrasse 26 | 2009-09-15 | -- | 2009 | 1 | |
| Kulturni centar Travno | Kulturni centar Travno (Cultural Center Travno) | Croatia, Zagreb, Božidara Magovca 17 | 2021-03-01 | -- | 2021 | 1 | |
| Kammerbühne | Kammerbühne | Germany, Schwerin | -- | -- | | | |
| Kolpingsaal | Kolpingsaal | Germany, Neunkirchen/Saar | 1980-03-17 | -- | 1980 | 1 | |
| Ken Shin Kōriyama bunka sentā | Ken Shin Kōriyama bunka sentā (Koriyama City Cultural Center) | Japan, Fukushima, 1-2 Tsutsumishitamachi, Koriyama, Fukushima 963-8878, Japan | 2010-02-09 | -- | 2010 | 1 | |
| Künstlerhaus | Künstlerhaus | Austria, Vienna, Karlsplatz 5 | 1985-05-09 | 2010-06-16 | 1985–2010 | 2 | |
| Kleines Theater Bad Godesberg | Kleines Theater Bad Godesberg | Germany, Bad Godesberg, Bonn, Koblenzer Straße 78 | 1967-10-31 | 2007-04-06 | 1967–2007 | 3 | |
| Kurtheater Bad Homburg | Kurtheater Bad Homburg | Germany, Bad Homburg vor der Höhe, Louisenstraße 58 | 2017-02-02 | 2023-06-20 | 2017–2023 | 2 | |
| Kristianstads Teater | Kristianstads Teater | Sweden, Kristianstad | 1884-03-24 | 1884-03-25 | 1884–2010 | 6 | |
| King's Theatre | King's Theatre | Scotland, Glasgow, 297 Bath St | 1965-03-12 | 1965-03-13 | 1965–1972 | 2 | |
| Kunsthaus Seelscheid | Kunsthaus Seelscheid | Germany, Neunkirchen-Seelscheid, Bergstraße 41-43 | 2005-03-03 | 2005-03-20 | 2005 | 1 | |
| Kangjiantang Juyuan | Kangjiantang Juyuan (Kangjiantang Theatre) | China, Yuzhong, Chongqing, 181 Zhongshan 1st Road | 1948-02-08 | -- | 1948 | 1 | |
| Kaufbeuren | Kaufbeuren | Germany, Swabia, Bavaria | 1878-- | -- | 1878 | 1 | |
| Kalisz | Kalisz | Poland, Kalisz | 1908-09-30 | -- | 1908 | 1 | |
| Kultur & Kongresshaus Aarau | Kultur & Kongresshaus Aarau | Switzerland, Aarau, Schlosspl. 9 | 2008-01-15 | -- | 2008 | 1 | |
| Koninklijke Vlaamse Schouwburg | Koninklijke Vlaamse Schouwburg | Belgium, Bruxelles, Quai aux Pierres de Taille 7 | 1975-05-21 | 1990-06-10 | 1975–1990 | 3 | |
| Kinder- und Jugendtheater Dortmund | Kinder- und Jugendtheater Dortmund | Germany, Dortmund, Sckellstraße 5-7, | 2000-03-04 | -- | 2000 | 1 | |
| Kråkerøy Ungdomsskole | Kråkerøy Ungdomsskole | Norway, Kråkerøy, Fredrikstad | 2006-10-31 | -- | 2006 | 1 | |
| Kravis Center | Kravis Center | United States of America, West Palm Beach, 701 Okeechobee Blvd | 2010-01-21 | 2010-01-22 | 2010 | 1 | |
| Korshch Teatr | Korshch Teatr | Russia, Moscow | 1892-01-01 | -- | 1892–1904 | 2 | |
| Kulturni centar Novog Sada | Kulturni centar Novog Sada (Cultural Center of Novi Sad) | Serbia, Novi Sad, Katolička porta 5 | 2011-11-07 | 2012-02-15 | 2011 | 1 | |
| Kautokeino | Kautokeino | Norway, Kautokeino | 1990-10-05 | -- | 1990–2001 | 2 | |
| Kongress-Saal AVALON Hotelpark Königshof | Kongress-Saal AVALON Hotelpark Königshof | Germany, Königslutter, Braunschweiger Str. 21A | 2007-02-18 | -- | 2007 | 1 | |
| Knox Memorial Theater | Knox Memorial Theater | United States of America, Mt Vernon, 112 E High St | 2024-04-06 | 2024-04-06 | 2024 | 1 | |
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