KK

KK, K.K., kK, k.k., or other sequences of two k's with or without punctuation may refer to:

Arts and media

KK, the production code for the 1967 Doctor Who serial The Faceless Ones
"KK" (song), a 2014 song by Wiz Khalifa
Kk. or Kirkpatrick number, a designation system for Domenico Scarlatti's keyboard sonatas, devised by Ralph Kirkpatrick
Kobylańska Katalog or KK, catalogue of the works of Frédéric Chopin, authored by Krystyna Kobylańska
Kvinner og Klær (Women and Clothes) or KK, a Norwegian weekly magazine
Kritika Kultura or KK, a Philippine journal of literary, language and cultural studies

Kazakh language (ISO 739-1 code kk), a Turkic language
##Kenyon and Knott or KK Phonetic Transcription, a transcription system used in the 1944 Pronouncing Dictionary of American English
Kernewek Kemmyn (Common Cornish), a variety of the Cornish language
Kk (digraph), used to represent a consonant in various languages

KK, IATA code of de:Leav Aviation, a German airline
KK, then IATA code of AtlasGlobal, formerly Atlasjet, a defunct Turkish airline
KK, the official symbol used for various railway lines operated by the private railroad, Keikyu.
KK, a former subway route replaced by the J/Z (New York City Subway service)

Kinnickinnic River (Milwaukee River) or "KK River", which flows into Lake Michigan
Kota Kinabalu or KK, a city in Sabah, Malaysia
Kuala Kangsar, royal town of Perak, Malaysia
Kuala Kurau, a town in Kerian District, Perak Malaysia
Kuala Klawang, a town in Jelebu District, Negeri Sembilan, Malaysia
Northern Cyprus or by its Turkish name "Kuzey Kıbrıs"

Kabushiki gaisha or kabushiki kaisha, a type of Japanese joint-stock company commonly abbreviated as "K.K." or ⟨㏍⟩.
Kaluza–Klein theory, a theory in physics
Karkat Vantas, a character from the webcomic Homestuck, frequently called "KK" by his friend Sollux
Jeep Liberty (KK), a model of Jeep Liberty made from 2008 until 2012
Kilokelvin (kK), a temperature or temperature difference of 1000 kelvins
k.k. or k.-k. (kaiserlich-königlich), meaning "imperial-royal" in the Austrian and Austro-Hungarian Empires
"kk", instant-messaging slang for "OK", an acceptance and indication that no further explanation is necessary
KK-theory, in algebraic topology
KK thesis, a principle of epistemology
Krusty Krab, a fictional SpongeBob SquarePants restaurant
K.K. Slider, a fictional character from the video game franchise Animal Crossing
KK Super Mart, a convenience store chain in Malaysia