Ka or KA may refer to:
Arts and entertainment K.A. (Kohntarkosz Anteria), a 2004 album by Magma KA (film), a 2024 Indian Telugu-language crime thriller film directed by the duo Sujith and Sandeep Kà, a Cirque du Soleil show Ka (Dark Tower), a plot element in Stephen King's Dark Tower series Mister Mosquito, a 2001 video game, known in Japan as Ka Kingda Ka, a former roller coaster at Six Flags Great Adventure
Businesses and organizations Businesses Aero Nomad Airlines, a Kyrgyz airline (IATA code KA) Cathay Dragon, formerly Dragonair (former IATA code KA) Kenya Airways Kamov, a Russian rotorcraft manufacturing company, whose products are prefixed with "La"
Fraternities Kappa Alpha Order, a fraternity founded in 1865 at Washington and Lee Kappa Alpha Society, a fraternity founded in 1825 at Union College Kuklos Adelphon, an 1800s-era Southern fraternity
Other organizations Karenni Army, a Burmese guerilla organization Knattspyrnufélag Akureyrar, an Icelandic football club Khan Academy, a non-profit educational organization King's Arms, Oxford, a pub known as the KA
Language Languages Ka, a variety of the Central Banda language Georgian language, by ISO 639-1 code
Characters Ka (Bengali), a consonant character Ka (cuneiform) Ka (Cyrillic), a letter in the Cyrillic script Ka (Indic), a group of related glyphs from the Brahmic family of scripts Devanagari ka, a letter in the Devanagari script Ka (Javanese) (ꦏ), a letter in the Javanese script Ka (kana), a syllabic grapheme in the Japanese katakana and hiragana scripts
People Ka (pharaoh) (fl. c. thirty-second century B.C.), Predynastic pharaoh of Upper Egypt Ka (rapper) (1972–2024), performer
Places Ka Farm, Østre Toten, Norway; see List of short place names Ka Island (Ka-to), North Korea Ka Lae, Hawaii, southernmost point in the fifty United States KA postcode area, Scotland Ka River, Nigeria Karlsruhe, Germany (e.g. code used on German vehicle registration plates) Karnataka, India
Science and technology Biology Ka, the absorption rate constant of a drug Ka, number of non-synonymous substitutions at a DNA site, used in Ka/Ks ratio Ka tree, Terminalia carolinensis
Other uses in science and technology
Ka, an acid dissociation constant Ka band, a microwave band Keepalive, a computer network message Kiloampere (kA), a unit of electric current kiloannum or kiloannus (ka), a unit of time equal to one thousand (103) years
Vehicles Ford Ka, a car NZR KA class, a New Zealand steam locomotive
Other uses Ka or kꜣ, "double" or "vital essence", an Ancient Egyptian concept of the soul or spirit Knight or Dame of St Andrew, a Barbadian award KA, a carbonated drink produced by the company A.G. Barr