Tiron may refer to:

• Tiron (chemical), a chemical compound
• Thiron-Gardais, also called Tiron, a commune in northern France

• Bill's Diner
• Bill Seedsman
• Bill Sefton
• Bill Sessions
• Bill Seward
• Bill Sewell (American football)
• Bill's Gamblin' Hall and Saloon
• Bills Gulch Glacier
• Bill S. Hansson
• Bill Shapiro
• Bill Sharer
• Bill Sharkey
• Bill Shaw (Australian footballer)
• Bill Sheahan
• Bill Sheils
• Bill Shelton (footballer)
• Bill Shelton (footballer, born 1902)
• Bill Shelton (footballer born 1902)
• Bill Shelton (footballer, born 1936)
• Bill Shelton (footballer born 1936)
• Bill Shenfield
• Bill Shepherd (English footballer)
• Bill Shepherd (politician)
• Bill Sheppard
• Bill Sheppard (music producer)