Althea (Old English: Alþea) is an English female given name. It is a variation of the Greek name Althaea (Αλθαια), which may be related to Greek ἀλθος althos ("healing").

Richard Lovelace used the name in a poem ("To Althea, from Prison") that John Milton later alluded to in his own poem "Lycidas".^[1]

• Althea Braithwaite (1940–2020), English children's author, illustrator, publisher and glass artist
• Althea Bridges (born 1936), Australian opera singer and music teacher
• Althea Currier (born 1941), American glamor model and actress
• Althea Flynt (1953–1987), fourth wife of Larry Flynt
• Althea Gibson (1927–2003), American female athlete
• Althea Forrest, one half of vocal duo Althea & Donna
• Althea McNish (1924–2020), British textile designer of Trinidadian origin
• Althea G. Quimby (1858-1942), American temperance leader
• Althea Reinhardt (born 1996), Danish handball player
• Althea Thauberger, Canadian artist
• Althea Wynne (1936–2012), English sculptor
• Althea Rae Janairo, actress aka Tia Carrere
• Altheia Jones-LeCointe, Trinidadian physician and research scientist, leader of the British Black Panther Movement

• "Althea", a song on the Grateful Dead studio album Go to Heaven
• Althaea officinalis, also called althea or marsh mallow, a perennial species indigenous to Europe, Western Asia, and North Africa used in herbalism and as an ornamental plant
• Hibiscus syriacus, also called althea, rose of Sharon or rose mallow, a perennial species indigenous to East Asia used in herbalism and as an ornamental plant
• Cyclone Althea (1971)
• Ethinylestradiol/cyproterone acetate, a birth control pill with brand name Althea