T
- Team Flakes – Nabisco
- Teddy Grahams Breakfast Bears Graham Cereal – Nabisco (1990)
- Teenage Mutant Ninja Turtles – Ralston (1989–1991)
- Temptations French Vanilla Cereal – Kellogg's (1995)
- Temptations Honey Roasted Pecan Cereal – Kellogg's (1995)
- Tiger Power – Kellogg's (2004–2006)
- Tiny Toon Adventures Cereal – Quaker (1990)
- Toasted Cinnamon Squares – Mom's Best Naturals
- Toasted Wheat-fuls – Mom's Best Naturals
- Toasties – Post Cereals
- Tony's Cinnamon Krunchers – Kellogg's (2003–2005)
- Tony's Turboz – Kellogg's (2005 – present)
- Total – General Mills (1961–present)
- Total Cinnamon Crunch
- Total Cranberry Crunch
- Total Honey Clusters
- Total Raisin Bran
- Triple Snack – Kellogg's (ca 1965–1967)
- Triples
- Trix – General Mills (1954 – present)
- Twinkles – General Mills (1960s)
Read more about this topic: List Of Breakfast Cereals