Johnson Controls, Inc. NYSE: JCI is an United States company, based in Milwaukee, Wisconsin, specializing in the design, manufacturing, and installation of automotive systems and nonresidential climate control systems.

Its Controls Group also has a prominent facilities management division. It was founded in 1885 by professor Warren S. Johnson, inventor of the first electric room thermostat.

Though the company got its start through the development and implementation of its thermostat technologies, but delved into many other areas including storage batteries, steam and gas powered automobiles, and hugh pneumatic clocks. Today it also controls a large stake in the automotive parts industry. It provides automotive batteries and all parts of the interior systems in cars and light trucks. It is particularly well known for moving many of its manufacturing jobs from the United States to Mexico due to decreased labor costs.

In 1968 the company aquired Penn Controls which produced refrigeration and gas heating controls. In 1978 the company aquired Globe Union, Inc. and entered the worldwide automotive battery business. In 1985 the company aquired Hoover Universal and entered the automotive seating and plastics machinery business. In 1989 the company aquired Pan Am World Services and started into the facilities management business. In August 2005, the company acquired York International, a manufacturer of commercial and industrial equipment for air conditioning, heating and refrigerating for $3.2 Billion. Its former stock symbol was YRK.