{"id":5844,"date":"2023-07-16T18:54:38","date_gmt":"2023-07-16T18:54:38","guid":{"rendered":"https:\/\/townsvillages.com\/us\/?p=5844"},"modified":"2026-08-22T12:02:06","modified_gmt":"2026-08-22T12:02:06","slug":"musselshell-county","status":"publish","type":"post","link":"https:\/\/townsvillages.com\/us\/musselshell-county\/","title":{"rendered":"Musselshell County, Montana"},"content":{"rendered":"

Musselshell County is a county in Montana, United States, straddling the Musselshell River in the south-central part of the state. It had a population of 4,730 at the 2020 census and covers 1,871 square miles (4,850 km2), of which 1,868 square miles is land and 2.8 square miles is water, centred near 46\u00b029\u2032N 108\u00b024\u2032W.<\/p>\n

Roundup is the county seat, and its postal code is 59072. The county has one city, one incorporated town, and a handful of unincorporated communities and census-designated places along the old Milwaukee Road rail line. Musselshell County observes Mountain Time.<\/p>\n

Towns & Villages in Musselshell County<\/h2>\n

Musselshell County has 14 named places on record: one city (Roundup, the seat), one town (Melstone), five census-designated places, and seven unincorporated rail-line and ranching communities with no current population count. “CDP” below marks a Census Bureau statistical area with no town government; “Unincorp.” marks a place name with no CDP boundary.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Place<\/th>\nType<\/th>\nPop.<\/th>\nZIP<\/th>\n<\/tr>\n<\/thead>\n
Roundup<\/td>\nCity · seat<\/td>\n1,742<\/td>\n59072 \/ 59073<\/td>\n<\/tr>\n
Melstone<\/td>\nTown<\/td>\n126<\/td>\n59054<\/td>\n<\/tr>\n
Musselshell<\/td>\nCDP<\/td>\n—<\/td>\n59059<\/td>\n<\/tr>\n
Klein<\/td>\nCDP<\/td>\n—<\/td>\n59072<\/td>\n<\/tr>\n
Camp Three<\/td>\nCDP<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Flat Willow Colony<\/td>\nCDP<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Kilby Butte Colony<\/td>\nCDP<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Bundy<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Delphia<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Elso<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Farralltown<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Gage<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Gibbtown<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Queens Point<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Riverside<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Klein sits directly north of Roundup and is treated by the Postal Service as part of the same 59072 delivery area rather than as a separate ZIP. Flat Willow Colony and Kilby Butte Colony are Hutterite colonies rather than open towns.<\/p>\n

ZIP Codes<\/h2>\n