Lahontan, La Hontan or la Hontan may refer to:
Lake Lahontan, an endorheic prehistoric lake in Nevada Lahontan Valley, a basin in Churchill County, Nevada Lahontan Dam, a dam situated on the Carson River, Nevada Lahontan Reservoir, a reservoir on the Carson River in Nevada Lahontan State Recreation Area, a public recreation area surrounding Lake Lahontan Louis-Armand de Lom d'Arce de Lahontan, Baron de Lahontan (1666 – before 1716), French explorer after whom all the former are named Lahontan, Pyrénées-Atlantiques, a commune in the Pyrénées-Atlantiques département of France