| Kunze, Ulrike | Ulrike Kunze | Costume Designer, Designer | 1999 | 2 | |
| Krayer, Sophie | Sophie Krayer | Costume Designer, Designer | 2017 | 2 | |
| Kleppek, Bartholomäus, Martin | Bartholomäus Martin Kleppek | Costume Designer, Designer | 2014 | 2 | |
| Kuş, Gamze | Gamze Kuş (Gamze Kus) | Costume Designer, Designer | 2012 - 2018 | 3 | |
| Kayan, Sabih | Sabih Kayan (Sabih Kayan) | Costume Designer, Designer | 1956 | 2 | |
| Kanakidou, Eleni | Eleni Kanakidou | Costume Designer, Designer | 2016 - 2017 | 4 | |
| Kasaska, Miglena | Miglena Kasaska | Costume Designer, Designer | 1983 | 2 | |
| Kalanova, Mira | Mira Kalanova | Costume Designer, Designer | 2010 | 2 | |
| Kirkene, Evangelia | Evangelia Kirkene | Costume Designer, Designer | 2020 | 2 | |
| Kirigin, Zdravka Ivandija | Zdravka Ivandija Kirigin | Costume Designer, Designer | 2014 - 2021 | 2 | |
| Kokamägi, Epp-Maria | Epp-Maria Kokamägi | Costume Designer, Designer | 1989 | 2 | |
| Kuroda, Yuko | Yuko Kuroda (Yuko Kuroda) | Costume Designer | 1994 | 1 | |
| Kromminga, Katharina | Katharina Kromminga (Katharina Kromminga) | Costume Designer | 2002 - 2017 | 8 | |
| Klintsjeva, Sandra | Sandra Klintsjeva (Sandra Klintsjeva) | Costume Designer | 2006 | 1 | |
| Kansallisteatteri, Suomen | Suomen Kansallisteatteri (Suomen Kansallisteatteri) | Costume Designer | 1972 - 1973 | 2 | |
| Kárpáti, Enikő | Enikő Kárpáti (Enikő Kárpáti) | Costume Designer | 1989 - 2014 | 4 | |
| Kearney, Kristine | Kristine Kearney (Kristine Kearney) | Costume Designer | 1984 - 2011 | 4 | |
| Kelly, Elaine | Elaine Kelly (Elaine Kelly) | Costume Designer | 2004 | 1 | |
| Kersting, Irmgard | Irmgard Kersting (Irmgard Kersting) | Costume Designer | 1992 - 1997 | 3 | |
| Kerwin, Shawn | Shawn Kerwin (Shawn Kerwin) | Costume Designer | 2000 | 1 | 1 |
| Kirsten, Astrid | Astrid Kirsten (Astrid Kirsten) | Costume Designer | 1987 - 1991 | 3 | |
| Knuivers, Gerda | Gerda Knuivers (Gerda Knuivers) | Costume Designer | 2002 | 14 | |
| Koch, Erika | Erika Koch (Erika Koch) | Costume Designer | 1951 - 1953 | 2 | |
| Kohl, Kathy | Kathy Kohl (Kathy Kohl) | Costume Designer | 2006 | 2 | |
| Köhler, Kathrin | Kathrin Köhler (Kathrin Köhler) | Costume Designer | 2002 | 1 | |
| Kopischke, Kärin | Kärin Kopischke (Kärin Kopischke) | Costume Designer | 2004 | 1 | |
| Krass, Michael | Michael Krass (Michael Krass) | Costume Designer | 1993 - 2017 | 6 | |
| Kreibich, Margit | Margit Kreibich (Margit Kreibich) | Costume Designer | 1954 | 1 | |
| Kremer, Ulli | Ulli Kremer (Ulli Kremer) | Costume Designer | 2000 - 2003 | 3 | |
| Kristensen, Bente | Bente Kristensen (Bente Kristensen) | Costume Designer | 1990 | 1 | |
| Krügler, Ingo | Ingo Krügler (Ingo Krügler) | Costume Designer | 2002 - 2008 | 4 | |
| Kulas, Leo | Leo Kulas (Leo Kulas) | Costume Designer | 1991 - 2007 | 4 | |
| Kündinger, Else | Else Kündinger (Else Kündinger) | Costume Designer | 1928 - 1933 | 4 | |
| Kwant, Lukas | Lukas Kwant (Lukas Kwant) | Costume Designer | 1996 - 2000 | 26 | |
| Kohlhaas, J | J Kohlhaas (J Kohlhaas) | Costume Designer | 1994 | 1 | |
| Klotz, Florence | Florence Klotz (Florence Klotz) | Costume Designer | 1982 | 1 | |
| Kinnear, Sherry | Sherry Kinnear (Sherry Kinnear) | Costume Designer | 2011 | 2 | |
| Khare, Lavanya | Lavanya Khare (Lavanya Khare) | Costume Designer | 2010 | 1 | |
| Kowalska, Wanda | Wanda Kowalska (Wanda Kowalska) | Costume Designer | 2008 | 1 | |
| Kerlé, Heta | Heta Kerlé (Heta Kerlé) | Costume Designer | 1954 - 1963 | 2 | |
| Ksoll, Josef | Josef Ksoll (Josef Ksoll) | Costume Designer | 1943 | 3 | |
| Kirchleitner, Lydia | Lydia Kirchleitner (Lydia Kirchleitner) | Costume Designer | 2006 - 2019 | 7 | |
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