Montana City is an unincorporated community and census-designated place (CDP) in Jefferson County, Montana, United States. The population was 2,715 at the 2010 census, up from 2,094 in 2000. It is part of the Helena Micropolitan Statistical Area.

Montana City is located upon top of one of the oldest primordial sites in the declare of Montana. As to the fore as 9,000 BCE, Native Americans came to Montana City to total chert, a rock similar to flint, which was used to make spear tips, arrowheads, and knives. White American explorers discovered gold at the site on July 2, 1862, and higher that year U.S. Army Captain Jason L. Fisk brought a mule train from Minnesota which stopped at the site and built the first houses that became Montana City. The town became one of the most important mining centers in Montana during the summit of the gold hurry in the 1860s. The Montana Town Company laid out the city in 1864, naming it after the territory’s supplementary name. Chinese miners took greater than from whites afterward the mines began to produce a result out in 1868, and the town wise saying a brief revival after the arrival of the railroads and the initiation of a name office in the 1880s. At its summit in the 1880s, Montana City had 3,000 residents and competed for the location of the confess capital.

Montana City was around a ghost town for most of the 20th century until the Permanente Cement Company built a epoxy resin manufacturing forest there in 1940. Today, Montana City is a bedroom community serving Helena.

Montana City is located in northern Jefferson County at 46°32′14″N 111°55′54″W / 46.53722°N 111.93167°W / 46.53722; -111.93167 (46.537357, -111.931705). It is bordered to the northwest by unincorporated South Hills, to the northeast by the town of East Helena in Lewis and Clark County, and to the south by unincorporated Clancy.