Authors Born on September 30
- Silas Weir Mitchell Actor, 1969
- Stephen Rodrick Journalist, 1966
- Sultan bin Abdul-Aziz Al Saud Royalty, 1925
- T-Pain Singer, 1984
- Ta-Nehisi Coates Writer, 1975
- Tea Obreht Novelist, 1985
- Theo Hutchcraft Singer-Songwriter, 1986
- Tony Hale Actor, 1970
- Virgil Abloh Fashion Designer, 1980
- W. S. Merwin Poet, 1927
- William Ernest Bowman Engineer, 1911
- William Jerome Songwriter, 1865
- William Wrigley, Jr. Industrial Engineer, 1861
- Wopke Hoekstra Minister, 1975
- Yana Kudryavtseva Rhythmic Gymnast, 1997
- Zak Orth Television Actor, 1970