There were 1,123 total businesses in the county zip codes, with 233 construction businesses (20.7%) accounting for the largest proportion of these businesses. 767 businesses (68.3%) had fewer than five employees, and two (0.2%) had 250 or more.
The county with the largest median business size was Cascade County. Median-sized businesses in Cascade County was between five and nine.
The following table shows the median business size in all Montana counties.
Median business size in all Montana counties (2016)
| County | Total Employees |
|---|---|
| Beaverhead County | 1-4 |
| Big Horn County | 1-4 |
| Blaine County | 1-4 |
| Broadwater County | 1-4 |
| Carbon County | 1-4 |
| Carter County | 1-4 |
| Cascade County | 5-9 |
| Chouteau County | 1-4 |
| Custer County | 1-4 |
| Daniels County | 1-4 |
| Dawson County | 1-4 |
| Deer Lodge County | 1-4 |
| Fallon County | 1-4 |
| Fergus County | 1-4 |
| Flathead County | 1-4 |
| Gallatin County | 1-4 |
| Garfield County | 1-4 |
| Glacier County | 1-4 |
| Golden Valley County | 1-4 |
| Granite County | 1-4 |
| Hill County | 1-4 |
| Jefferson County | 1-4 |
| Judith Basin County | 1-4 |
| Lake County | 1-4 |
| Lewis and Clark County | 1-4 |
| Liberty County | 1-4 |
| Lincoln County | 1-4 |
| McCone County | 1-4 |
| Madison County | 1-4 |
| Meagher County | 1-4 |
| Mineral County | 1-4 |
| Missoula County | 1-4 |
| Musselshell County | 1-4 |
| Park County | 1-4 |
| Petroleum County | 1-4 |
| Phillips County | 1-4 |
| Pondera County | 1-4 |
| Powder River County | 1-4 |
| Powell County | 1-4 |
| Prairie County | 1-4 |
| Ravalli County | 1-4 |
| Richland County | 1-4 |
| Roosevelt County | 1-4 |
| Rosebud County | 1-4 |
| Sanders County | 1-4 |
| Sheridan County | 1-4 |
| Silver Bow County | 1-4 |
| Stillwater County | 1-4 |
| Sweet Grass County | 1-4 |
| Teton County | 1-4 |
| Toole County | 1-4 |
| Treasure County | 1-4 |
| Valley County | 1-4 |
| Wheatland County | 1-4 |
| Wibaux County | 1-4 |
| Yellowstone County | 1-4 |
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