9 Largest Counties in the US by Area

4. Northwest Arctic Borough, Alaska

Total Land Area (in square miles): 35,663.28

Ranked 4th, the Northwest Arctic Borough is also the 4th largest county in Alaska by total land area. It has a population of 7,361 people, of which 50.9% are employed and 18.5% face poverty. Of those employed, 42% are appointed in government positions, 33.4% work with private companies, and 3.1% are self-employed. The median household income in the county is $77,647, with families earning a median income of over $77,000, and married couples earning a median income of  $108,571.