9 Largest Counties in the US by Area

1. Yukon-Koyukuk Census Area, Alaska

Total Land Area (in square miles): 145,575.60

The largest county by total area in the US, and the largest county in Alaska, the Yukon-Koyukuk Census Area of Alaska is larger than the US state of Montana. The county has diverse industries that drive employment. The transportation, education, healthcare, retail trade, public administration, manufacturing, and construction sectors play a vital role in the progress of the county’s economy. Overall, the community thrives on a broad spectrum of services, ensuring economic resilience. Of the 5,129 people who live in the Yukon-Koyukuk Census Area, 58.2% are employed and 14.1% have attained higher education.

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