Nye County
The largest is Nye County with 18,147 square miles.
According to census.gov, the 2007 population estimate for Nye County, Nevada is 44,116.
Nye County, NV is 18,159 sq miles (47,032 km²).
Clark County (which includes Las Vegas) is the largest county in population in Nevada.
Nye County, population 38,180, is the second largest county in the United States!
Tonopah is in Nye County, Nevada, United States. The population was 2,627 at the 2000 census
The five largest counties by land area in the United States are San Bernardino County (California), Coconino County (Arizona), Nye County (Nevada), Elko County (Nevada), and Mohave County (Arizona).
Nye County Courthouse was created in 1905.
{| |- | Unorganized Borough, Alaska North Slope Borough, Alaska Northwest Arctic Borough, Alaska Matanuska-Susitna Borough, Alaska Lake and Peninsula Borough, Alaska San Bernardino County, California Coconino County, Arizona Nye County, Nevada Elko County, Nevada Kenai Peninsula Borough, Alaska Mohave County, Arizona Denali Borough, Alaska Apache County, Arizona Lincoln County, Nevada Sweetwater County, Wyoming Inyo County, California Harney County, Oregon Navajo County, Arizona Malheur County, Oregon Humboldt County, Nevada Maricopa County, Arizona Pima County, Arizona Fremont County, Wyoming White Pine County, Nevada Idaho County, Idaho |} {| |- | Unorganized Borough, Alaska North Slope Borough, Alaska Northwest Arctic Borough, Alaska Matanuska-Susitna Borough, Alaska Lake and Peninsula Borough, Alaska San Bernardino County, California Coconino County, Arizona Nye County, Nevada Elko County, Nevada Kenai Peninsula Borough, Alaska Mohave County, Arizona Denali Borough, Alaska Apache County, Arizona Lincoln County, Nevada Sweetwater County, Wyoming Inyo County, California Harney County, Oregon Navajo County, Arizona Malheur County, Oregon Humboldt County, Nevada Maricopa County, Arizona Pima County, Arizona Fremont County, Wyoming White Pine County, Nevada Idaho County, Idaho |}
At 18,159 square miles (47,030 km2), Nye is the third largest county in terms of area in the United States, excluding the boroughs of Alaska. [Source: Wikipedia]
Yucca Mountain is located in Nye County, in the south-central part of the U.S. state of Nevada approximately 100 miles northwest of Las Vegas.