| Cultivar Name | Plant Size | Origin | Flower Color | Season | Source | Registered |
| 'Wagtail' | Medium | Unknown | Light-Purple | June | Smith, Eric & British Hosta and Hemerocallis Society | .1988 |
| 'War Party' | Large | Unknown | Pale-Lavender | July | Goodwin, Randy | .2000 |
| 'Warwick Cup' | Small | Hybrid | - | - | Jones, Gil | .1993 |
| 'Warwick Essence' | Large | Hybrid | Pure-White | July into August | Jones, Gil | .1993 |
| 'Wasatch Blue Hearts' | Small | Unknown | - | - | Draper, Glen | --NR-- |
| 'Waterford' | Large | Hybrid | Near-White | June into July | Moldovan, Steve | .1983 |
| 'Water's Edge' | Medium | Unknown | - | - | Stegeman, Bev & Stegeman, Dave | --NR-- |
| 'Waterslide' | Medium | Hybrid | Med-Lavender | August | Hansen, Hans & Walters Gardens | .2018 |
| 'Waukon the Moon' | Medium | Unknown | - | - | Axmear, Bob | --NR-- |
| 'Waukon Water' | Medium | Unknown | Pale-Lavender | - | Axmear, Bob | --NR-- |
| 'Wayside Blue' | Medium | Unknown | Near-White | June into July | Ruh, Peter | .1989 |
| 'Website' | Medium | Hybrid | Near-White | July into August | Powell, Loleta | .1999 |
| 'Wendy Blew' | Medium | Unknown | - | - | Unknown | --NR-- |
| 'Weser' | Medium | Unknown | Med-Lavender | August to September | Klose, Heinz & Ruh, Peter & Ruh, Jean | .2003 |
| 'What's That' | Medium | Sport | Pale-Lavender | July into August | White, Brian | --NR-- |
| 'Wheaton Blue' | Large | Sport | Pale-Lavender | July into August | Zilis, Mark | .1999 |
| 'Whirlybird' | Large | Unknown | - | - | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'White Angel Supreme' | Large | Sport | Near-White | July | Anderson, Jim | --NR-- |
| 'White Butterflies' | Medium | Hybrid | Pure-White | July into August | Zilis, Mark | .2011 |
| 'White Undies' (Kulpa) | Medium | Unknown | - | - | Kulpa, John | --NR-- |
| 'Whybblue' | Large | Hybrid | Near-White | June into July | Gilligan, Madelon | .2013 |
| 'WiFi' | Large | Hybrid | - | - | White, Jeff | --NR-- |
| 'Will of Fortune' | Medium | Hybrid | Near-White | July | Livingston, Ron | .2003 |
| 'Willimantic' | Large | Unknown | - | - | Lauman & Summers, Alex | --NR-- |
| 'Willy Nilly' | Giant | Unknown | Near-White | June into July | Holly, Gladys & Ruh, Peter | .1998 |
| 'Willy Vanilly' | Giant | Sport | Near-White | July | Holly, Gladys | --NR-- |
| 'Wilma Coney' | Large | Unknown | Pale-Lavender | July | Unknown | --NR-- |
| 'Wilson Lake' | Large | Unknown | - | June into July | Benedict, Dr Ralph (Herb) & Benedict, Dorothy & Kuenster, Rod | .2010 |
| 'Winfield Blue' | Medium | Unknown | Pale-Lavender | July into August | Zilis, Mark | .1999 |
| 'Winfield White' | Medium | Unknown | - | - | Unknown | --NR-- |
| 'Wings of Angels' | Large | Unknown | - | July into August | Zolock, Steve & Zolock, Sarah | .2006 |
| 'Winsome Blue' | Small | Unknown | Pale-Lavender | August | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Winter Frost' | Medium | Hybrid | Med-Lavender | September | Beilstein, Doug & Beilstein, Mardy | .2013 |
| 'Wishing Well' | Large | Hybrid | Near-White | July into August | Dean, Don | .2011 |
| 'Witches Brew' | Large | Hybrid | - | - | Ross, Henry & Gardenview Horticultural Park | .1981 |
| 'Witten Lodge' | Giant | Hybrid | Near-White | July into August | Gilligan, Madelon | .2015 |
| 'Wizard of Ahs' | Large | Sport | Near-White | June | Duback, Robyn | --NR-- |
| 'Woge' | Large | Sport | Near-White | July into August | Simon, Dr Hans | --NR-- |
| 'Wolf' | Large | Unknown | - | - | Summers, Alex | --NR-- |
| 'Woodland Blue' | Large | Hybrid | Near-White | June | Simpers, Lucille & Ruh, Peter | .1993 |
| 'Woodstream Ivy' | Small | Unknown | - | - | Unknown | --NR-- |
| 'World Class' | Medium | Hybrid | - | August | Goodwin, Randy | .2009 |
| 'Wrede White and Blue' | Small | Hybrid | Med-Lavender | August to September | Pollock, Ali & Wrede, Arthur | .2005 |
| 'Wrinkles and Crinkles' | Large | Hybrid | Near-White | June into July | Englerth, Lawrence | .1985 |
| 'Wylde Green Angel' | Large | Sport | Near-White | July | Stratton, John & Stratton, Elizabeth | --NR-- |
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