- Wachowska, Magdalena (Space Opera)
- Wächter, Eberard (Die Fledermaus, The Consul)
- Waddington, Henry (Miranda)
- Wagner, Amber (Der fliegende Holländer)
- Wagner, Jacquelyn (Don Giovanni, Euryanthe, Die Meistersinger von Nürnberg)
- Wagner, Josef (La flûte enchantée, Tristan und Isolde, 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, Les Danaïdes)
- Watson, Katherine (Il ritorno d’Ulisse in patria, Hippolyte et Aricie)
- Watson, Keel (Fidelio, RhineGold)
- Watson, Lilian (Mitridate re di Ponto)
- Watson, Linda (Die Walküre, Salome)
- Watson, Katherine (Miranda)
- Watts, Andrew (The Rake’s Progress, Lear, Lear, The Minotaur, Alice in Wonderland, Figaro Gets a Divorce)
- Watts, Elizabeth (Don Giovanni, Le grand macabre)
- Watts, Nicholas (The Turn of the Screw)
- Way, James (Owen Wingrave)
- Webb, David (Saul)
- Weikl, Bernd (Arabella)
- Weiland, Agnes Selma (Sancta Susanna)
- Weilitsch, Ljuba (The Consul)
- Weissmann, Nadine (Das Rheingold, Orphée aux Enfers, Pelléas et Mélisande, Aufstieg und Fall der Stadt Mahagonny)
- Welton, Derek (Das Wunder der Heliane, Elektra)
- Wenborne, Caroline (Das Rheingold)
- Wenwei Zhang (Die Zauberflöte)
- Werba, Markus (La Calisto, La finta giardiniera, Zaide, Le nozze di Figaro, Così fan tutte, Il matrimonio segreto, Hans Heiling, Agnese, Die Fledermaus, Die tote Stadt, Ariadne auf Naxos, 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)
- Whately, Kitty (Owen Wingrave)
- Whelan, Paul (L’incoronazione di Poppea)
- Whicher, Monica (Persée)
- White, Wendy (Faust)
- White, Willard (Il Giasone, Don Giovanni, Alceste, La damnation de Faust, Falstaff, Iolanta, Da una casa di morti, 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)
- Widmer, Oliver (Don Giovanni)
- Wilde, Scott (Gianni Schicchi, The Rake’s Progress)
- Wilder, Zachary (El Prometeo)
- Willeit, Sabina (Arlecchino)
- Willets, Owen (Arminio)
- Williams, Chrystal E. (RhineGold, Lady Macbeth of Mtsensk, The Ice Break)
- Williams, Joel (L’Eliogabalo)
- Williams, Roderick (The Magic Flute)
- Willis-Sørensen, Rachel (Il trovatore, Les vêpres siciliennes, Peter Grimes)
- Wilkinson, Kathleen (The Turn of the Screw)
- Wilmering, Michael (Der Freischütz, La voix humaine/L’heure espagnole)
- Wilson, Carole (Jenůfa, The Turn of the Screw)
- Wilson, Rachael (Oberon, Otello, Salome)
- Windgassen, Wolfgang (Die Fledermaus)
- Wingate, Verity (Ritratto)
- Winkler, Martin (Orphée aux Enfers, Der Rosenkavalier, Lulu, The Nose, Die Teufel von Loudun)
- Winter, Louise (Le nozze di Figaro)
- Winters, Corinne (La juive, Pelléas et Mélisande, Jenůfa, Káťa Kabanová, Dialogues des Carmélites)
- Woldt, Lars (Der fliegende Holländer)
- Wolf, Andreas (Johannes-Passion, Don Giovanni, Così fan tutte)
- Wölfel, Martin (Teseo)
- Workman, Charles (Il ritorno d’Ulisse in patria, Acis and Galatea, Semele, Così fan tutte, La Gazzetta, La jolie fille de Perth, Les stigmatisés, Káťa Kabanová, Da una casa di morti, Die Vögel, Francesca da Rimini, Cardillac, Marco Polo, Ti vedo, ti sento, mi perdo)
- Worms, Guilhelm (Alcina)
- Wottrich, Endrik (Alfonso und Estrella)
- Wulkopf, Cornelia (Hans Heiling)
- Wundsam, Katrin (Didone abbandonata, Rigoletto)
- Wyn, Fflur (Rodrigo)
- Wyn-Davies, Cathrin (Don Giovanni)
⸫