| Wagonner | Andrew | Now, the fire |  |
| Walckiers | Eugene | Opus 105 |  |
| Walckiers | Eugene | Opus 107 |  |
| Walford Davies | Henry | See Davies |  |
| Walker | Ernest | Quartet for piano and strings in c (1910) |  |
| Walker | Ernest | Quartet for pianoforte and strings in D (1899) |  |
| Walker | Gwyneth | Letters to the world: Reflections on the poetry of Emily Dickens (2001) |  |
| Wall | Alfred M. | Quartet in c (1921) |  |
| Wall | Alfred M. | Piano Quartet in F-sharp Minor |  |
| Wallace | William | Prelude en Toccata |  |
| Wallach | Joelle | Runes and Rituals |  |
| Wallis | Harold | Piano Quartet |  |
| Walsworth | Ivor | Piano Quartet (1949) |  |
| Walter | Caspar J. | Klavierquartett (1994) |  |
| Walter | Stefan Johannes | Hamlets Dilemma fur Klavierquartett (1993) |  |
| Walter | Stefan Johannes | Reflexionen ueber eine Begegnung von Mr. Hyde mit Dorian Grays Bildnis, fur Klavierquartett (2001) |  |
| Walthew | Richard H. | Quartet in G Minor for violin, viola, cello and piano (1903) |  |
| Walton | William T. | Quartet (1918/1921)(revised 1973/4) |  |
| Wang | Jie | Songs for Mahler in het absence of words (2011) |  |
| Wang | Cynthia Lee | Piano quartet for violin,. viola, cello and piano with optional narrator |  |
| Wang | Ashley Fu-Tsun | Piano Quartet (2007) |  |
| Ward | Frank E. | Quartet |  |
| Warren (Warren-Davies) | Betsy | Quartet for piano and strings no.1 |  |
| Warren (Warren-Davies) | Betsy | Quartet for piano and strings no. 2 |  |
| Wasserman | Alexander | Piano Quartet (1990) |  |
| Watkins | Huw | Piano Quartet |  |
| Waxman | Franz | Pianoquartet |  |
| Waxman | Donald | Piano Quartet |  |
| Weber | Carl M.von | Opus 8 in Bes (1809) |  |
| Weber | K. Gustav | Opus 4 in c (1878) |  |
| Weber | K. Gustav | Opus 16 |  |
| Weber | Carl M. von | March |  |
| Weeks | James | The Lewisham Harmony (2008) |  |
| Weidberg | Ron | Piano Quartet, for violin, viola, cello & piano (2003) |  |
| Weiner | Lawrence | Quartus (1998) |  |
| Weingartner | Felix | Liebesfeier, arr. for pianoquartet |  |
| Weir | Judith | A serbian Cabaret (1984), for speaking piano quartet |  |
| Weir | Judith | Arise! Arise! You slumbering Sleepers (1999) |  |
| Weir | Judith | Distance and Enchantment (1988) |  |
| Weir | Judith | El Rey de Francia (1993) |  |
| Weir | Judith | Pianoquartet White as Snow (2000) |  |
| Weismann | Julius | Opus 8 (1902) |  |
| Weiss | Julius | Der Fortschritt des jungen Violinisten, Op.43 |  |
| Werder | Felix | Opus 11 (1954) |  |
| Werder | Felix | Pianoquartet No.2 (1991) |  |
| Wessman | Harri | Pianoquartet (1985) |  |
| Westrop | Henry J. | Quartetto Concertante in As Opus 2 (1873) |  |
| Wheeler | Scott | Dragon Mountain (1993) |  |
| Whettam | Graham | Balade Hebraique (1999) |  |
| Whitman | Thomas | Holmes Suite (2007) |  |
| Whitman | Thomas | Quartet for piano and strings (2003) |  |
| Whittaker | William G. | Arr. Prelude to Cantata no.212 from Joh.S. Bach |  |
| Whittaker | William G. | Phantasie-Quartet (1929) |  |
| Widdicombe | Trevor | Ebfort Suite |  |
| Widor | Charles M. | Opus 66 in a (1891) |  |
| Widor | Charles M. | Opus 64 Conte d\'avril no 3 aubade |  |
| Wiede | Klaus | Family Affairs |  |
| Williamson | Nathan | Crystal (2008) |  |
| Willis | Richard | Variants (1992) |  |
| Willmers | Heinrich R. | Opus 85 in g (1852) |  |
| Wilms | Johann W. | Opus 22 in C |  |
| Wilms | Johann W. | Opus 30 in F |  |
| Wilms | Johann W. | 3 Rondeaux, in F Major, D Major and Bes Major, Opus 19 |  |
| Wilson | Tom David | Piano Quartet |  |
| Wilson | Ian | Noct (2011) |  |
| Wilson | Peter | Green stringpops: fun pieces for violin, viola, cello and piano: lustige oko (1992) |  |
| Wilson-Dickson | Andrew | Piano Quartet (1969) |  |
| Wilton | Lou Ann | Piano Quartet (1948) |  |
| Winbeck | Heinz | Poco a poco? (1974) |  |
| Windhagauer | Horst Rudolf | Sáppho und Pháon. Poem for Piano, Violin, Viola and Violoncello |  |
| Winding | August H. | Opus 17 in D (1870) |  |
| Winfrey | Kalen | Fantastics Escapades in c minor (2011), Opus 1 no. 2 |  |
| Winkler | David | Pianoquartet No.1 (2004) |  |
| Winkler | David | Pianoquartet No.2 |  |
| Winkler | David | Pianoquartet NO.3 (2010) |  |
| Winkler (Vinkler) | Alexander G.A. | Opus 8 in g (1899) |  |
| Winsor | John | Piano Quartet (2011) |  |
| Winter | Tomas | Opus 137 |  |
| Wiprud | Theodore | Brooklyn Variations (2005) |  |
| Wison | Christopher | Quartet |  |
| Witte | George H. | Opus 5 in A (1867) |  |
| Witting | Kart | Quartet |  |
| Wohlhauser | Rene | Klavierquartett fur streichtrio (violine, vola,cello) and piano (1979, rev. 1987) |  |
| Wolf | Daniel J. | Sowing and reaping (1994) |  |
| Wolff | J.C. Ludwig | Opus 15 in g (1843) |  |
| Wolff | Christian | Emma (1989) |  |
| Wolfgang | Gernot | Metamorphosis (2001) |  |
| Wolfgang | Gernot | From Vienna, with love (2011) |  |
| Wolstenholme | William | Piano Quartet in E, Opus 87 |  |
| Wong | Cynthia Lee | Piano quartet with optional narrator (2010) |  |
| Wood | Ralph W. | Pianoquartet No.1 (1944) |  |
| Wood | Ralph W. | Pianoquartet No. 2 (1980) |  |
| Wood | Steve | Dances for Emli, for string trio and piano |  |
| Woollen | Russell | Piano Quartet in A (1952) |  |
| Woolrich | John | Adagissimo (1997) |  |
| Woolrich | John | Five Pieces |  |
| Woolrich | John | Sestina (1997) |  |
| Wordsworth | William B. | Opus 36 in d (1948) |  |
| Worsaae | Nicolai | Epilogus I (2013) |  |
| Wot (Wu) | Felix Firmiana (Tong) | Easy Waltz, Op.169 (2012/9) |  |
| Wozny | Joanna | Vom Verschwinden einer Landschaft II (2011) |  |
| Wranitzky | Paul | Divertissement Opus 34, 3 (1798) |  |
| Wranitzky | Paul | Divertissement Opus 34,1 (1798) |  |
| Wranitzky | Paul | Divertissement Opus 34,2 (1798) |  |
| Wuethrich | Hans | Zwei Minuten gegen das Vergessen (1978) |  |
| Wyk | Carl van | Piano Quartet 1985 |  |
| Wyner | Yehudi | 2 Romances (1980) |  |
| Wyner | Yehudi | Concordance (2012) |  |
| Wynne | David | Quartet (1971) |  |
| Wysocki | Zdzislaw | Quartetto Opus 46 (1990) |  |