W-Z
- Wackies – General Mills (1965–1967)
- Waffelos – Ralston (Late 1970s-early 1980s)
- Waffle Crisp – Post Cereals (1996 – present) (Sporadic Availability)
- Weet-Bix – Sanitarium Health Food Company
- Weetabix – Weetabix Limited – (generic equivalent branded as "Whole-wheat biscuits" or similar)
- Weetabix Minis – Weetabix Limited
- Weetos – Weetabix Limited
- Wheat Honeys Nabisco
- Wheat Stax – General Mills – (1966)
- Wheatena
- Wheaties – General Mills – "The Breakfast of Champions" – (1924 – present)
- Wild Animal Crunch – Kellogg's (2008–2009)
- Yog-Active
- Zany Fruits - Western Family
Read more about this topic: List Of Breakfast Cereals