Halliburton (/ˈhælɨbɜrtən/; NYSE: HAL) is one of the world's largestoilfield services companies with operations in more than 70 countries. It has hundreds of subsidiaries, affiliates, branches, brands, and divisions worldwide and employs over 60,000 people.

The company has dual headquarters located in Houston and in Dubai, where Chairman and CEO David Lesar works and resides, "to focus [the] company’s Eastern Hemisphere Growth." The company will remain incorporated in the United States.

Halliburton's major business segment is the Energy Services Group (ESG). ESG provides technical products and services for petroleum and natural gas exploration and production. Halliburton's former subsidiary, KBR, is a major construction company of refineries, oil fields, pipelines, and chemical plants. Halliburton announced on April 5, 2007 that it had finally broken ties with KBR, which had been its contracting, engineering and construction unit as a part of the company for 44 years.

U.S. regional office locations are Anchorage, Alaska; Bakersfield, California; Denver, Colorado; Lafayette, Louisiana; Oklahoma City, Oklahoma; Farmington, New Mexico; Naples, Utah; and Odessa, Texas.