Duquesne is a ghost town[1] in the Patagonia Mountains in eastern Santa Cruz County, Arizona, near the international border with Sonora, Mexico.

[2] American prospectors in the Patagonia Mountains had established claims in Washington Gulch as early as the 1860s, but recurrent Apache raids prevented the area from being fully developed until the 1890s.

On June 6, 1890,[1] the post office in Washington Camp was closed and moved to Duquesne, which was also the location of the company headquarters and the Bonanza Mine.

[2][3] During its heyday, Duquesne boasted 1,000 residents, several businesses and numerous homes, one of which was a large Victorian frame house belonging to George Westinghouse.

[4] There are other ghost towns in the area as well, including Harshaw and Mowry to the north and Lochiel just to the southeast, along the border with Mexico.