Astraea is a Greek goddess. Astraea may also refer to:

• Astraea (gastropod), a genus of sea snails
• Astraea (plant), a genus of plants in the family Euphorbiaceae
• Astraea (nuclear warhead) - planned British thermonuclear warhead
• 5 Astraea, asteroid
• a synonym for Croton (plant), a gymnosperm plant genus of Rushfoil
• HMS Astraea, a name for warships reused by the Royal Navy
• Astraea-class cruiser, a Royal Navy ship class
• Astraia, the ancient Greek name of the city of Radoviš in modern North Macedonia
• ASTRAEA (aerospace), UK UAV programme
• Astraea (album), album by Rolo Tomassi, 2012
• Astraea Lesbian Foundation for Justice, an LGBT foundation based in the United States

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