Simon Bailey may refer to:

• Simon Bailey (priest) (1955–1995), Anglican priest and writer
• Simon Bailey (archivist), Keeper of the Archives at the University of Oxford in England
• Simon T. Bailey (born 1968), American speaker, author, life coach and entrepreneur
• Simon Bailey (British police officer), Chief Constable of the Norfolk Constabulary
• Simon Bailey (runner) (born 1980), English fell runner
• Simon Bailly, English politician

• Tree diagrams
• Tree Ear Fungus
• Tree ear fungus
• Tree farm
• Tree farms
• Tree fern
• Tree Fern
• Tree ferns
• Treefingers
• Tree Frog
• Treefrog
• Tree graffiti
• Tree grape
• Tree graph
• Tree (graph theory)
• Tree hash
• Treehorn
• Treehorn's Treasure
• Tree house
• Treehouse (disambiguation)
• Treehouse hotel
• Treehouse of Horror II
• Treehouse of Horror III
• Treehouse of Horror IV
• Treehouse of Horror IX