31st Street may refer to:

• 31st Street (Manhattan), New York City
• 31st Street Bridge, Pittsburgh, Pennsylvania

• Milton Schwartz (spy)
• Milton S. Eisenhower
• Milton Shapp
• Milton S. Hershey
• Milton Sirotta
• Milton S. Latham
• Milton Slocum Latham
• Milton (sterilisation)
• Milton Stover Eisenhower
• Milton the Toaster
• Milton (town), Chittenden County, Vermont
• Milton (town), Chittenden County, VT
• Milton (town), New York
• Milton (town), Rock County, WI
• Milton (town), Rock County, Wisconsin
• Milton (town), Saratoga County, New York
• Milton Township
• Milton Township, Antrim County, MI
• Milton Township, Antrim County, Michigan
• Milton Township, Antrim, MI
• Milton Township, Antrim, Michigan
• Milton Township, Cass County, MI
• Milton Township, Cass County, Michigan
• Milton Township, Cass, MI
• Milton Township, Cass, Michigan