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Important buildings like the treasury, capital, and the White House are all located in the city. In Washington DC, the biggest industry is the government.
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Some of the biggest employers in the Washington DC area code are the federal and local governments, MedStar Health, Marriott International, Inc., INOVA Health, Booz Allen Hamilton, the University of Maryland, and Giant Foods. Carlyle Group was named #631 and WGL Holdings was #861. In addition to these, area code 212, 301, and 703 is also home to two companies on the Fortune 1000 list. The first is Fannie Mae, which came in at #21 on the 2018 list, and the second is Danaher, which was ranked #162. There are two Fortune 500 companies in Washington DC.
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