Lochiel is a populated place and former border crossing in southern Santa Cruz County, Arizona, United States, approximately 25 miles east of Nogales.

Basically a ghost town, the townsite is located in the southwestern part of the San Rafael Valley on Washington Gulch, about 1.5 miles west of the Santa Cruz River.

[6] The Lochiel area was originally inhabited by a small community of Mexican ranchers before a smelting works was erected in the late 1870s to serve the nearby mines in the Patagonia Mountains, bringing in American settlers.

[4][5] In 1884 the cattle baron Colin Cameron established the San Rafael Ranch about a mile north of Luttrell.

Several years after that, the international boundary between Sonora and Arizona was surveyed and it was found that half of the settlement was in Mexican territory.