Anaconda, county seat of Deer Lodge County, which has a consolidated city-county government, is located in southwestern Montana, United …Anaconda, county seat of Deer Lodge County, which has a consolidated city-county government, is located in southwestern Montana, United States. Located at the foot of the Anaconda Range, the Continental Divide passes within 8 mi south of the community. As of the 2020 census the population of the consolidated city-county was 9,421. As a consolidated city-county area, it ranks as the ninth most populous city in Montana, but as only a city is far smaller.