Gypsum is a soft mineral composed of calcium sulfate dihydrate.

Gypsum may also refer to:

• Gypsum, Bhutan
• Gypsum, Colorado, opU.S.
• Gypsum, Kansas, U.S.
• Gypsum, Ohio, U.S.
• Gypsum Creek, a river in Kansas

• Walter Keppel, 9th Earl of Albemarle
• Walter Kerr Theater
• Walter Kershaw
• Walter Kershaw: mural artist
• Walter K. Foster House
• Walter Kichefski Football Award
• Walter Kidd
• Walter Kidde Dinosaur Park
• Walter Kiesling
• Walter Kilner
• Walter Kilrea
• Walter King
• Walter Kingsford
• Walter Kingsmill
• Walter Kirk
• Walter Kirschbaum
• Walter Kissling
• Walter Kitchener
• Walter Kitundu
• Walter K. Lew
• Walter Klimmek
• Walter K. Link
• Walter Kniep
• Walter Knight-Adkin
• Walter Koch (astrologer)