| Yelland, Sue | Sue Yelland | Costume Designer | 1993 | 1 | |
| Ytterhus, Bjørg | Bjørg Ytterhus | Costume Designer | 1995 | 1 | |
| Youxuan, Wang | Wang Youxuan | Costume Designer | 1996 | 2 | |
| Yaven, Mitchell | Mitchell Yaven | Costume Designer | 1979 | 1 | |
| Ystehede, Ellen, Dæhli | Ellen Dæhli Ystehede | Costume Designer | 2014 - 2019 | 7 | |
| Yokkaichi, Keiko | Keiko Yokkaichi | Costume Designer | 1991 | 1 | |
| Yaji, Shigeru | Shigeru Yaji | Costume Designer | 1994 - 2008 | 4 | |
| Yeong, Alan | Alan Yeong | Costume Designer | 2009 | 1 | |
| Yañez, Paz | Paz Yañez | Costume Designer | 2015 - 2017 | 14 | |
| Yeater, Gladys | Gladys Yeater | Costume Designer | 2000 | 1 | |
| Yan, Ni | Ni Yan | Costume Designer | 2018 | 1 | |
| Yousefpoor, Dina | Dina Yousefpoor | Costume Designer | 2019 | 1 | |
| Yvernault, Séverine | Séverine Yvernault | Costume Designer | 2015 | 2 | |
| Yule, Fir | Fir Yule | Costume Designer | | 1 | |
| Yoon, Bae | Bae Yoon | Costume Designer | 2022 | 1 | |
| York, Landis Maren | Landis Maren York | Costume Designer | 2025 | 1 | |
| Yadav, Sanjay | Sanjay Yadav | Costume Designer, Designer | 2015 | 2 | |
| Yant, Alice | Alice Yant | Costume Designer, Designer | 1963 | 2 | |
| Yulin, Yngvar | Yngvar Yulin | Costume Designer, Designer | 2014 - 2016 | 10 | |
| Yamazoe, Junko | Junko Yamazoe | Dancer | 1992 | 2 | |
| Yeh, Po-Sheng | Po-Sheng Yeh | Dancer | 2015 | 1 | |
| Yamamoto, Takashi | Takashi Yamamoto | Dancer | 2015 | 2 | |
| Young, Jerry | Jerry Young | Dancer | 1957 | 1 | |
| Yiannis, Ikonomidis | Ikonomidis Yiannis | Dancer | 2019 | 1 | |
| Yoshida, Kenkichi | Kenkichi Yoshida | Designer | 1925 - 1928 | 5 | |
| Yongjing, Chen | Chen Yongjing | Designer | 1956 | 1 | |
| Yunchao, Zhang | Zhang Yunchao | Designer | 2010 | 1 | |
| Yeargan, Michael | Michael Yeargan | Designer | 1978 - 2010 | 3 | 1 |
| Ylinen, Pekka | Pekka Ylinen | Designer | 1980 | 1 | |
| Yamada, Osamu | Osamu Yamada | Designer | 1967 | 1 | |
| Yaneva, Elitza | Elitza Yaneva | Designer | 2002 | 1 | |
| York, Matthew | Matthew York | Designer | 2004 | 1 | |
| Yang, Eugene Chin-yuan | Eugene Chin-yuan Yang | Designer | 2005 - 2006 | 2 | |
| Young, Patrick | Patrick Young | Designer | 2008 | 1 | |
| Yeo, Shin-dong | Shin-dong Yeo | Designer | 2012 | 1 | |
| Yu, Haibo | Haibo Yu | Designer | 1983 | 1 | |
| Yang, Ying | Ying Yang | Designer | 2015 - 2017 | 3 | |
| Yu, Rongjun | Rongjun Yu | Designer | 2019 - 2020 | 3 | |
| Yatsovskis, Marius | Marius Yatsovskis | Designer | 2018 | 1 | |
| Yılmazer, Cem | Cem Yılmazer | Designer | 2019 | 1 | |
| Yvonne, Isabelle | Isabelle Yvonne | Designer | 2022 | 2 | |
| Yazdkhasti, Dariusch | Dariusch Yazdkhasti | Designer, Director | 2013 - 2017 | 4 | |
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