| Karlskoga | Karlskoga | Sweden | 2002-09-05 | -- | 2002 | 1 | |
| Kvitsund Gymnas | Kvitsund Gymnas | Norway, Kviteseid, Jacob Naadlands Veg 2 | 2012-11-30 | 2012-12-01 | 2012 | 1 | |
| Konserthusteatern Karlskrona | Konserthusteatern Karlskrona | Sweden, Karlskrona, Stortorget 16 | 2010-12-09 | -- | 2010 | 1 | |
| Kelsey Theatre | Kelsey Theatre | United States of America, Princeton Junction, 1200 Old Trenton Rd | 2013-10-24 | 2013-10-24 | 2013 | 1 | |
| Kafeneio Dasopoulou | Kafeneio Dasopoulou | Greece, Larisa | 1910-10-02 | 1975-04-18 | 1910–1975 | 2 | |
| Kulturhuset Hagelund | Kulturhuset Hagelund | Norway, Trysil, Storvegen 5 | 1978-12-02 | 2015-10-17 | 1978–2015 | 2 | |
| Komaba Agora Theater | ΑΓΟPA (Komaba Agora Theater) (Komaba Agora Theater) | Japan, Meguro-ku, Komaba 1-11-13, Yubinbango | -- | -- | | | |
| Kammerbühne | Kammerbühne | Germany, Schwerin | -- | -- | | | |
| Kontraskjæret | Kontraskjæret | Norway, Oslo, Oslo | 2012-08-25 | -- | 2012 | 1 | |
| Kvernhuset Ungdomskole | Kvernhuset Ungdomskole | Norway, Fredrikstad, Kvernhusveien 1 | 2006-11-09 | 2006-11-13 | 2006 | 1 | |
| Kurtheater Salzbrunn | Kurtheater Salzbrunn | Poland, Szczawno-Zdrój | 1903-07-10 | -- | 1903 | 1 | |
| Kleines Theater | Kleines Theater | Germany, Landshut, Bauhofstraße 1 | 2006-02-10 | 2011-04-30 | 2006–2011 | 3 | |
| Kulturhuset Milepelen | Kulturhuset Milepelen | Norway, Sagstua, Herredsveien 2 | 1989-09-17 | 2015-09-30 | 1989–2015 | 3 | |
| Kirche Schönau | Kirche Schönau | Switzerland, Thun | 1985-11-29 | 1985-11-30 | 1985 | 1 | |
| Kulturhuset i Toftlund | Kulturhuset i Toftlund | Denmark, Toftlund, Søren Jensens Vej 2 | 2002-03-08 | -- | 2002 | 1 | |
| Kärntner Grenzlandtheater Klagenfurt | Kärntner Grenzlandtheater Klagenfurt | Austria, Klagenfurt | 1942-01-09 | -- | 1942 | 1 | |
| Konzert und Festhalle | Konzert und Festhalle | Germany, Wörth/Rhein | 1980-03-19 | -- | 1980 | 1 | |
| Koma Sahnesi | Koma Sahnesi (Koma Stage) | Turkey, Istanbul, Hasanpaşa Mah. Derici Zeynel Sokak No: 15/A KADIKÖY | 2020-01-24 | -- | 2020 | 1 | |
| King’s Head Theatre | King’s Head Theatre | England, London, 115 Upper Street | 1996-06-19 | -- | 1996 | 1 | |
| Kleines Haus at Staatstheater Mainz | Kleines Haus at Staatstheater Mainz | Germany, Mainz, Tritonplatz | 1998-10-17 | 2001-06-28 | 1998–2001 | 2 | |
| Künstlerhaus Mousonturm | Künstlerhaus Mousonturm | Germany, Frankfurt am Main, Waldschmidtstraße 4 | 2000-12-16 | 2015-01-29 | 2000–2015 | 2 | |
| KC Vooruit | KC Vooruit | Belgium, Gent, Sint-Pietersnieuwstraat 23 | 1994-03-25 | 2005-02-16 | 1994–2005 | 5 | |
| Kolvereid | Kolvereid | Norway, Kolvereid | 1995-02-22 | -- | 1995–2005 | 2 | |
| Künstlerhaus | Künstlerhaus | Austria, Vienna, Karlsplatz 5 | 1985-05-09 | 2010-06-16 | 1985–2010 | 2 | |
| Kjøllefjord | Kjøllefjord | Norway, Kjøllefjord | 1970-09-14 | -- | 1970 | 1 | |
| Kokkola | Kokkola | Finland, Kokkola | -- | -- | | | |
| Katoto Secondary School | Katoto Secondary School | Malawi, Katoto | 2006-06-04 | -- | 2006 | 1 | |
| Kalundborg | Kalundborg | Denmark, Kalundborg | -- | -- | | | |
| Kent State University Theatre | Kent State University Theatre | United States of America, Kent, B141 Music and Speech Building | 1968-04-06 | -- | 1968 | 1 | |
| Kinderspace | Kinderspace | Japan, Tokyo | -- | -- | | | |
| Korsør Theater | Korsør Theater | Denmark, Korsør | 1902-11-11 | -- | 1902–1907 | 3 | |
| Kyanarushiti gekijō | Kyanarushiti gekijō (Canal City Theater) | Japan, 812-0018 Fukuoka, Hakata Ward, Sumiyoshi, 1 Chome−2−1 | 2023-11-03 | 2023-11-05 | 2023 | 1 | |
| Kolozsvari Nemzeti Színház | Kolozsvari Nemzeti Színház | Romania, Cluj-Napoca | 1889-12-09 | 1931-03-31 | 1889–1944 | 10 | |
| Kom Hoorn | Kom Hoorn | Netherlands, Terschelling | 2003-06-13 | 2003-08-14 | 2003 | 1 | |
| Kinobrakka | Kinobrakka | Norway, Jørstadmoen | 1956-05-29 | -- | 1956 | 1 | |
| Kautokeino | Kautokeino | Norway, Kautokeino | 1990-10-05 | -- | 1990–2001 | 2 | |
| Korskirken | Korskirken | Norway, Bergen, Vågsbunnen | 2008-02-13 | 2008-02-14 | 2008 | 1 | |
| Königliches Schauspielhaus | Königliches Schauspielhaus | Germany, Berlin, Gendarmenmarkt | 1889-03-04 | 1914-02-19 | 1889–1940 | 17 | |
| Komediehuset | Komediehuset | Norway, Bergen, Engen 39 | 1853-01-02 | 1928-10-05 | 1853–1928 | 92 | |
| Kjølnes ungdomsskole | Kjølnes ungdomsskole | Norway, Porsgrunn, Porsgrunn | 2005-11-01 | 2006-11-14 | 2005–2006 | 2 | |
| Kurhausbühne | Kurhausbühne | Germany, Baden Baden | 1919-01-11 | -- | 1919–1925 | 10 | |
| Kauno Valstybinis Akademinis Dramos Teatras | Kauno Valstybinis Akademinis Dramos Teatras | Lithuania, Kaunas, Laisvės al. 71 | 1998-03-17 | -- | 1998 | 1 | |
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