Download the list of Companies in Montana. Smartscrapers provides an accurate directory and the latest data on the number of Companies in Montana There are 10244 Companies in Montana as of April 1, 2026; which is an 0.00% increase from 2023. Of these locations, 9230 Companies which is 90.10% of all Companies in Montana are single-owner operations, while the remaining 1014 which is 9.90% are part of larger brands. The top three cities with the most Companies are Harlowton with 1177 Companies, Billings with 687 Companies, Missoula with 569 Companies. Average age of Companies in Montana is 4 years and 6 months.