Hard means something that is difficult to do. It may also refer to:

• Hardness, resistance of physical materials to deformation or fracture
• Hard water, water with high mineral content

• Hard (TV series), a French TV series
• Hard (band), a Hungarian hard rock supergroup
• Hard (music festival), in the U.S.

• Hard (EP), Goodbye Mr Mackenzie, 1993
• Hard (Brainpower album), 2008
• Hard (Gang of Four album), 1983
• Hard (Jagged Edge album), 2003
• Hard (Shinee album), 2023, and its title track
• Hard, a 2017 EP from the band The Neighbourhood

• "Hard" (Rihanna song), 2009
• "Hard" (Sophie song), 2014
• "Hard", a song by Royce da 5'9" from the 2016 album Layers
• "Hard", a song by Why Don't We from the 2018 album 8 Letters
• "Hard", a song by Sophie from the 2015 compilation album Product
• "Hard", a song by Poppy from the 2023 album Zig

• Hard, Austria
• Hard (Zürich), Switzerland

• Hard (surname)
• Hard architecture, impersonal windowless buildings with graffiti-resistant walls usually associated with prisons and other secure structures
• Nickname of Masaki Sumitani ( HardGay / HardoGay )
• Hard (nautical), a beach or slope convenient for hauling out vessels
• hard, slang for an erection
• Hard (gamer), Anthony Barkhovtsev
• Hayward Area Recreation and Park District, California, U.S.
• Hard, consonants that are not palatalized

• All pages with titles beginning with Hard
• All pages with titles containing hard
• Hardcourt or hard court, is a surface or floor on which a sport is played
• Hardtack
• Hardware (disambiguation)
• Computational hardness assumption