K-series

K-series may refer to:

• Lincoln K-series, a line of luxury vehicle
• Scania K-series, a series of bus chassis with longitudinal rear-mounted engine
• Skoda K-series, a heavy howitzer
• K series engine (disambiguation), including:
  • Honda K engine
  • Mazda K engine
  • Rover K engine
• International Harvester K and KB Series, a line of heavy trucks of the 1940s
• QI (K series), the eleventh series of quiz show QI
• "K" series, a set of messages in the military Variable Message Format data protocol.