| Karcag | Karcag | Hungary, Karcag | -- | -- | | | |
| Krasnyj fakel | Krasnyj fakel (Red torch) | Russia, Novosibirsk, Ulitsa Lenina, 19 | -- | 2021-12-19 | 1964–2021 | 4 | |
| Kulturni centar Zrenjanina | Kulturni centar Zrenjanina (Zrenjanin Cultural Center) | Serbia, Zrenjanin, Narodne omladine 1 | -- | -- | | | |
| Kammerbühne | Kammerbühne | Germany, Schwerin | -- | -- | | | |
| Krøderen | Krøderen (Kroederen) | Norway, Krøderen | -- | -- | | | |
| Kazalište Marina Držiča | Kazalište Marina Držiča | Croatia, Dubrovnik, Pred Dvorom 3 | -- | -- | | 1 | |
| Köln | Köln | Germany, Köln | -- | -- | | | |
| Karlskrona | Karlskrona | Sweden, Karlskrona | -- | -- | | | |
| Komaba Agora Theater | ΑΓΟPA (Komaba Agora Theater) (Komaba Agora Theater) | Japan, Meguro-ku, Komaba 1-11-13, Yubinbango | -- | -- | | | |
| Koppang | Koppang | Norway, Koppang | -- | -- | | | |
| Kenosha | Kenosha | United States of America, Kenosha | -- | -- | | | |
| Konak Sahnesi | İzmir Devlet Tiyatrosu Konak Sahnesi ( Izmir State Theatre Konak Stage) (Konak Stage) | Turkey, Izmir, Mithatpaşa Caddesi No: 110 Konak | -- | -- | | | |
| Keble O’Reilly Theatre | Keble O’Reilly Theatre | England | -- | -- | | | |
| Kaliningrad | Kaliningrad | Russia, Kaliningrad | -- | -- | | | |
| Kent | Kent | England, Kent | -- | -- | | | |
| Kinderspace | Kinderspace | Japan, Tokyo | -- | -- | | | |
| Koszalin | Koszalin | Poland, Koszalin | -- | -- | | | |
| Kulttuuritehdas Korjaamo | Kulttuuritehdas Korjaamo | Finland, Helsinki | -- | -- | | | |
| Kuressaare | Kuressaare | Estonia, Kuressaare | -- | -- | | | |
| Kaiserliches Deutsches Hoftheater | Kaiserliches Deutsches Hoftheater St. Petersburg | Russia, Saint Petersburg | -- | -- | | | |
| Klagenfurt | Klagenfurt | Austria, Klagenfurt | -- | -- | | | |
| Korgen | Korgen | Norway, Korgen | -- | -- | | | |
| Königsberg | Königsberg | Germany, Königsberg | -- | -- | | | |
| Kneževo | Kneževo | Bosnia and Herzegovina | -- | -- | | | |
| Kings Lynn Arts Centre | Kings Lynn Arts Centre | England, King's Lynn, Norfolk, 29 King Street | -- | -- | | | |
| Kärnten | Kärnten | Austria | -- | -- | | | |
| Koriyama | Koriyama | Japan, Koriyama | -- | -- | | | |
| Kotka | Kotka | Finland, Kotka | -- | -- | | | |
| Kungliga Teatern | Kungliga Teatern | Sweden, Stockholm, Gustav Adolfs torg 2 | -- | -- | | | |
| Krasnyy Fakel | Krasnyy Fakel (The Novosibirsk State Academic Drama Theatre «Red Torch») | Russia, Novosibirsk Oblast, Ulitsa Lenina, 19 | -- | -- | | | |
| Karlsruhe | Karlsruhe | Germany, Karlsruhe | -- | -- | | | |
| Kardam (Arman) | Кардам (Kardam) | Bulgaria, Kardam | -- | -- | | | |
| Kokkola | Kokkola | Finland, Kokkola | -- | -- | | | |
| Kalundborg | Kalundborg | Denmark, Kalundborg | -- | -- | | | |
| Kyoto | Kyoto | Japan, Kyoto | -- | -- | | | |
| Komediehuset | Komediehuset | Norway, Bergen, Engen 39 | 1853-01-02 | 1928-10-05 | 1853–1928 | 92 | 1 |
| Kongliga Dramatiska Teatern (Gamla Dramaten) | Kongliga Dramatiska Teatern (Gamla Dramaten) | Sweden, Stockholm, Kungsträdgården | 1857-11-04 | 1905-04-19 | 1857–1903 | 40 | 1 |
| Kristiania Norske Theater | Kristiania Norske Theater | Norway, Oslo, Møllergata 1 | 1858-11-24 | 1859-04-13 | 1858–1859 | 3 | |
| Kristiansand Teater | Kristiansand Teater | Norway, Kristiansand | 1859-04-08 | 1998-11-16 | 1859–1998 | 16 | |
| Kongelige Teater, Det | Det Kongelige Teater | Denmark, Copenhagen, August Bournonvilles Passage 8 | 1870-02-16 | 2025-02-28 | 1870–2025 | 102 | |
| Königliches Hof- und National-Theater | Königliches Hof- und National-Theater | Germany, Munich, Max-Joseph-Platz 2 | 1876-04-10 | -- | 1876–1907 | 10 | |
| Königliches Hoftheater Dresden-Neustadt | Königliches Hoftheater Dresden-Neustadt | Germany, Dresden | 1876-09-27 | 1901-03-04 | 1876–1901 | 10 | |
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