Kinder Morgan, Inc. is one of the largest energy infrastructure companies in North America. The company specializes in owning and controlling oil and gas pipelines and terminals.

Kinder Morgan owns an interest in or operates approximately 83,000 miles (134,000 km) of pipelines and 143 terminals. The company's pipelines transport natural gas, liquefied natural gas, ethanol, biodiesel, hydrogen, refined petroleum products, crude oil, carbon dioxide, and more. Kinder Morgan also stores or handles a variety of products and materials at their terminals such as gasoline, jet fuel, ethanol, coal, petroleum coke, and steel.

The company has approximately 72,000 miles (116,000 km) of natural gas pipelines and is the largest natural gas pipeline operator in the United States, moving about 40 percent of the natural gas consumed in the country. The company previously had built a major presence in Canada with the Trans Mountain pipeline, but that infrastructure is now publicly owned and operated. The company's CO₂ division traditionally provides carbon dioxide (CO₂) for enhanced oil recovery projects in North America, but also increasingly for carbon sequestration efforts.

Kinder Morgan Energy Partners (KMP) was founded in 1997 when a group of investors acquired the general partner of a small, publicly traded pipeline limited partnership (Enron Liquids Pipeline, L.P.) later renamed Kinder Morgan Energy Partners, L.P. Its cofounder Rich Kinder had been the president of Enron. After Kinder was denied an expected promotion to replace Kenneth Lay as chief executive officer, he departed the company, purchasing its interest in ELP for $40 million. Later that year, Kinder Morgan Energy Partners acquired Santa Fe Pacific Pipeline Partners.

In 1999, Kinder Morgan conducted a reverse merger with KN Energy, a utility and pipeline company. Natural Gas Pipeline Company of America (NGPL), which serves the Chicago market, was acquired through this deal. KN Energy became Kinder Morgan's second publicly traded company, Kinder Morgan, Inc. (KMI).

In 2001, Kinder Morgan's third publicly traded company, Kinder Morgan Management, LLC (KMR) was formed to facilitate institutional ownership of KMP equity.

On August 28, 2006, Kinder Morgan announced that it would be taken private in a management-led leveraged buyout totaling approximately $22 billion. Outside participants in the transaction include Fayez Sarofim, Goldman Sachs Capital Partners and Highstar Capital (then owned by AIG). In 2007, Kinder Morgan sold KN Energy to General Electric Co. and Alinda Capital Partners, which renamed the company SourceGas.

KMI began trading again on the NYSE on February 11, 2011, following the largest private-equity backed IPO offering in US history.