Foster County Post Offices

87 9th Ave N
Carrington, North Dakota 58421

161 Glenfield St
Glenfield, North Dakota 58443

128 City St
Grace City, North Dakota 58445

322 Johnston St
McHenry, North Dakota 58464

Foster County

There are 4 US Post Offices in Foster County serving a total of 3,452 residents equating to 863 residents per post office. It's estimated that approximately 5,510 packages are handled across the 4 county post offices annually. Foster County is a county located within the U.S. state of North Dakota. As of the 2010 census, the population was 3,343. Its county seat is Carrington. The county was founded in 1873 and later organized in 1883. It was named for George I. Foster, a pioneer and member of the Territorial legislature."