Population in Montana
Places in Montana of 5,000 or More Population —With ZIP and Area Codes
Source: U.S. Bureau of the Census, Department of Commerce.
The following is a list of places of 5,000 or more inhabitants recognized by the Bureau of the Census, U.S. Deptartment of Commerce, based on July 1, 2004 Census Bureau estimates. Also given are 1990 census populations. For instructions and further information, see places in the United States by population.
| ZIP | Place | 2004 | 1990 |
| 59711 | Anaconda-Deer Lodge County | 9,088 | 10,356 |
| 59714 | Belgrade | 7,046 | 3,422 |
| *59101 | Billings | 96,977 | 81,125 |
| *59718 | Bozeman | 32,414 | 22,660 |
| *59701 | Butte | 32,393 | 33,336 |
| 59901 | Evergreen (c) | 6,215 | 4,109 |
| *59401 | Great Falls | 56,503 | 55,125 |
| 59501 | Havre | 9,460 | 10,201 |
| *59601 | Helena | 27,196 | 24,609 |
| — | Helena Valley Southeast (c) | 7,141 | 4,601 |
| — | Helena Valley West Central (c) | 6,983 | 6,327 |
| *59901 | Kalispell | 17,381 | 11,917 |
| 59044 | Laurel | 6,339 | 5,686 |
| 59457 | Lewistown | 6,116 | 6,097 |
| 59047 | Livingston | 7,062 | 6,701 |
| 59301 | Miles City | 8,315 | 8,461 |
| *59801 | Missoula | 61,790 | 42,918 |
| 59801 | Orchard Homes (c) | 5,199 | 10,317 |
| 59937 | Whitefish | 6,151 | 4,368 |