Jefferson County ZIP Codes

List of ZIP Codes in Jefferson County

The following table lists ZIP Codes associated with Jefferson County, Montana, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

About Jefferson County ZIP Codes

Jefferson County in Montana (MT) is served by approximately 6 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.

Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 12,837 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.

Many of the most significant population centers in Jefferson County are located in cities such as Clancy, Whitehall, Boulder, Cardwell, Jefferson City. These cities and towns help define the economic and demographic character of the county.

Most ZIP Codes in Jefferson County, Montana follow the America/Denver time zone.