K9

K9 or K-9 most commonly refers to:

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

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

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 155mm 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