Carter County Post Offices

13700 Highway 212
Alzada, Montana 59311

10203 Highway 212
Boyes, Montana 59316

116 Church Ave
Ekalaka, Montana 59324

102 Main St
Hammond, Montana 59332

Carter County

There are 4 US Post Offices in Carter County serving a total of 1,126 residents equating to 282 residents per post office. It's estimated that approximately 1,797 packages are handled across the 4 county post offices annually. Carter County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 1,160, making it the fifth-least populous county in Montana. The county seat is Ekalaka.