Årø ({{lang-de|Aarö}}) is a small island in the Lillebælt in Denmark. It is due east of Haderslev and just offshore from Årøsund.

• Henry Simon (politician)
• Henry Simons (disambiguation)
• Henry Simpson Bridgeman
• Henry Simpson Lunn
• Henry Simson
• Henry Sire
• Henry S. Kesler
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• Henry Skrine
• Henry Slater
• Henry Slater (disambiguation)
• Henry Slater (MP)
• Henry Slatter
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• Henry Sloman
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• Henry's marsh moth
• Henry Smith (1803-1887)
• Henry Smith (athlete)
• Henry Smith Holden
• Henry Smith (Texas Governor)
• Henry Smyth (British Army officer, born 1816)
• Henry Smyth (Master of Magdalene College)