Where can you find a list of pipeline companies operating in the United States?

You can find a list of pipeline companies operating in the United States on the INGAA Foundation's website. This site only lists companies that are members of the Interstate Natural Gas Association of America.

As of 2015, there are 24 member pipeline companies listed at INGAA.org. These companies include Alliance Pipeline, Boardwalk Pipelines, Cheniere Energy, Inc and several others.

These companies are headquartered in various states including Minnesota, Texas, South Carolina and Virginia. There are also locations in Michigan and Connecticut, among other states.

PetroStrategies.org has a list of the United State's top ten pipeline companies based on mileage. As of 2012, Magellan Pipeline Co. has the most pipeline with 9,185 miles.