K9 or K-9 most commonly refers to: * K9, the nickname of police dogs and the police dog unit itself * Canine or ''

Canis ''Canis'' is a genus of the Caninae which includes multiple extant species, such as wolves, dogs, coyotes, and golden jackals. Species of this genus are distinguished by their moderate to large size, their massive, well-developed skulls an ...

'', a genus including dogs, wolves, coyotes, and jackals *

K9 Thunder The K9 Thunder is a South Korean 155 mm self-propelled howitzer designed and developed by the Agency for Defense Development and civil contractors including Dongmyeong Heavy Industries, Kia Heavy Industry, Poongsan Corporation, and Samsung Aer ...

, a 155mm self-propelled artillery used by the Republic of Korea Armed Forces 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 ''Tokusou Sentai Dekaranger'' is a Japanese television series and the 28th entry in the ''Super Sentai'' series. In an iteration of the planet Earth where extraterrestrial contact is made possible, the S.P.D. (Special Police Dekaranger) battles ...

, 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 K9 Web Protection is discontinued content-control software developed by Blue Coat Systems. In 2016, K9 Web Protection was acquired by Symantec as part of the company's purchase of Blue Coat Systems. In April 2019, Symantec announced that K9 Web Pr ...

, 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'' * 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

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 * Pusan East (K-9) Air Base, an abandoned air base in Busan, South Korea

Automotive

Kia K9 The Kia K9, marketed as the Kia K900 in the United States and Canada and as the Kia Quoris in other export markets, is a full-size luxury sedan manufactured and marketed by Kia, now in its second generation. The K9 was launched in South Korea ...

, a full-size luxury sedan *

K-9 (Kansas highway) K-9 is a state highway in the U.S. state of Kansas. The highway goes east–west through Kansas. It has its western terminus south of Dresden at an intersection with K-123 and an eastern terminus at its junction with U.S. Route 73 near ...

, a state highway in Kansas, US *

BYD K9 The BYD K-series bus (sometimes just referred to as the BYD ebus or BYD electric bus) are a line of battery electric buses manufactured by the China, Chinese automaker BYD Auto, BYD, powered with its self-developed lithium iron phosphate battery, ...

, a battery electric bus

Other