K9 or K-9 most commonly refers to: K9, the nickname of police dogs and the police dog unit itself Canine or Canis, a genus including dogs, wolves, coyotes, and jackals K9 or K-9 may also refer to:

Fictional dogs K9 (Doctor Who), the name of several robotic canines in the British science fiction television series Doctor Who K-9 (Looney Tunes), a dog in the Looney Tunes cartoon series K9 Murphy, a mechanical dog in the Japanese television series Tokusou Sentai Dekaranger

Computing AMD K9, a microprocessor K-9 Mail, a mail client for the Android operating system K9 Web Protection, a web content control software K9Copy, a DVD backup and authoring program for Unix-like operating systems

Entertainment K-9 (film), a 1989 American film K-9 (film series), a film series consisting of four movies K-9 (TV series) a British/Australian comedy/adventure series starring the same character as featured in Doctor Who K-9 and Company earlier British pilot for a potential adventure series, also starring the character from Doctor Who. K9, a television station serving Boise, Idaho, now known as KNIN-TV Sonata in G for Keyboard and Violin, K. 9, a sonata by Wolfgang Amadeus Mozart K-9: Public Security Bureau, Division 9 (Manga series), written and illustrated by Tetsuya Okuyama.

Military HMAS K9, an Australian submarine K-9 (missile), a Soviet short-range air-to-air missile Kahr K9, a variant of the Kahr K series, a 9×19mm Parabellum semi-automatic pistol manufactured by the American company Kahr Arms K9 Thunder, a 155 mm self-propelled artillery used by the Republic of Korea Armed Forces Pusan East (K-9) Air Base, an abandoned air base in Busan, South Korea

Automotive Kia K9, a full-size luxury sedan K-9 (Kansas highway), a state highway in Kansas, US BYD K9, a battery electric bus

Other K9 glass, an inexpensive variety of crown glass K9, a children's shoe size Kalitta Charters, IATA airline code Kenneth Walker III (born 2000), American football running back whose nickname is "K9"

See also

Canine (disambiguation) Kanine (disambiguation) 9K (disambiguation)