Business Resources Miles City is the regional medical and trade center for southeastern Montana. We offer everything from the box stores to quaint little “mom and pop” stores. Miles City’s trade area is almost double the population of our town, making it a very inviting business environment. Come and spend time walking down our historic Main Street, do some shopping, or enjoy a great meal. Whatever path you take, there will be friendly people behind every door. STARTING A NEW BUSINESS? CHECK OUT THESE RESOURCES. Miles City Area Economic Development Business License Application City of Miles City Government Custer County Government State of Montana Montana Department of Commerce PLANNING A MEETING, BANQUET, RECEPTION or OTHER EVENT? Events Venues Catering