- Wachowska, Magdalena (Space Opera)
- Wächter, Eberard (Die Fledermaus, The Consul)
- Waddington, Henry (Miranda)
- Wagner, Amber (Der fliegende Holländer)
- Wagner, Jacquelyn (Euryanthe, Die Meistersinger von Nürnberg)
- Wagner, Josef (La flûte enchantée, Das Wunder der Heliane)
- Wakizono, Aya (Il borgomastro di Saardam, Francesca da Rimini)
- Walewska, Małgorzata (Goplana)
- Walker, Alfred (Satyagraha)
- Walker, David (Rinaldo)
- Wall, Erin (Così fan tutte)
- Wallace, Stephen (L’opera seria)
- Wallin, Brian (The Ghosts of Versailles)
- van der Walt, Deon (Linda di Chamounix)
- Wang, Nian (Carlo il Calvo)
- van Wanroij, Judith (Orfeo, La coronatione di Poppea)
- Watson, Katherine (Il ritorno d’Ulisse in patria, Hippolyte et Aricie)
- Watson, Keel (Fidelio)
- Watson, Lilian (Mitridate re di Ponto)
- Watson, Linda (Die Walküre)
- Watson, Katherine (Miranda)
- Watts, Andrew (The Rake’s Progress, Lear, The Minotaur, Alice in Wonderland, Figaro Gets a Divorce)
- Watts, Elizabeth (Don Giovanni, Le grand macabre)
- Watts, Nicholas (The Turn of the Screw)
- Weikl, Bernd (Arabella)
- Weiland, Agnes Selma (Sancta Susanna)
- Weilitsch, Ljuba (The Consul)
- Weissmann, Nadine (Orphée aux Enfers, Pelléas et Mélisande)
- Welton, Derek (Das Wunder der Heliane, Elektra)
- Wenwei Zhang (Die Zauberflöte)
- Werba, Markus (La finta giardiniera, Zaide, Le nozze di Figaro, Il matrimonio segreto, Hans Heiling, Agnese, Die Fledermaus, Die tote Stadt, Ariadne auf Naxos)
- Wernick, Gabriel Alexander (Violanta)
- Wesseling, Maria Riccarda (Orpheus und Eurydike, Teseo, Les contes d’Hoffmann)
- Westbroek, Eva-Maria (La dama di picche, La fanciulla del west, Cavalleria rusticana/Pagliacci, Andrea Chénier, Trittico, Trittico, Die Frau ohne Schatten, Wozzeck, Lady Macbeth di Mcensk, Anna Nicole)
- Wettergreen, Caroline (Die Zauberflöte, Die Vögel)
- Wey, Terry (Il Sant’Alessio, Xerxes)
- Whelan, Paul (L’incoronazione di Poppea)
- Whicher, Monica (Persée)
- White, Scott (The Rake’s Progress)
- White, Willard (Il Giasone, Don Giovanni, Alceste, La damnation de Faust, Falstaff, Iolanta, L’amore delle tre melarance, Rise and Fall of the City of Mahagonny, Aufstieg und Fall der Stadt Mahagonny, Wozzeck, Œdipus Rex, Le grand macabre, El Niño)
- Wilder, Zachary (El Prometeo)
- Willeit, Sabina (Arlecchino)
- Willets, Owen (Arminio)
- Williams, Chrystal E. (The Ice Break)
- Williams, Roderick (The Magic Flute)
- Willis-Sørensen, Rachel (Il trovatore, Les vêpres siciliennes)
- Wilkinson, Kathleen (The Turn of the Screw)
- Wilson, Rachael (Oberon, Otello, Salome)
- Windgassen, Wolfgang (Die Fledermaus)
- Wingate, Verity (Ritratto)
- Winkler, Martin (Orphée aux Enfers, Lulu, The Nose)
- Winter, Louise (Le nozze di Figaro)
- Winters, Corinne (La juive, Pelléas et Mélisande)
- Wolf, Andreas (Don Giovanni, Così fan tutte)
- Wölfel, Martin (Teseo)
- Workman, Charles (Acis and Galatea, Semele, Così fan tutte, La Gazzetta, La jolie fille de Perth, Les stigmatisés, Da una casa di morti, Die Vögel, Cardillac, Marco Polo, Ti vedo, ti sento, mi perdo)
- Wottrich, Endrik (Alfonso und Estrella)
- Wulkopf, Cornelia (Hans Heiling)
- Wundsam, Katrin (Didone abbandonata, Rigoletto)
- Wyn, Fflur (Rodrigo)
- Wyn-Davies, Cathrin (Don Giovanni)
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