Mercury is a closed village in Nye County, Nevada, United States, 5 miles north of U.S. Route 95 at a point 65 miles northwest of Las Vegas. It is situated within the Nevada National Security Site and was constructed by the Atomic Energy Commission to house and service the staff of the test site. The specific site was known as Jackass Flats and nearby Nevad…Mercury is a closed village in Nye County, Nevada, United States, 5 miles north of U.S. Route 95 at a point 65 miles northwest of Las Vegas. It is situated within the Nevada National Security Site and was constructed by the Atomic Energy Commission to house and service the staff of the test site. The specific site was known as Jackass Flats and nearby Nevada Test Site 400. Today, the site is governed by the United States Department of Energy. As part of the test site, the village is not accessible to the general public. It was named after the mercury mines which flourished in its general vicinity a century before the village itself was established. The current population is unknown.