There are 6 US Post Offices in Kidder County serving a total of 2,261 residents equating to 377 residents per post office. It's estimated that approximately 3,609 packages are handled across the 6 county post offices annually. Kidder County is a county located in the U.S. state of North Dakota. As of the 2010 census, the population was 2,435. Its county seat is Steele. The county was created on January 4, 1873 and was named for Jefferson Parrish Kidder, who served as a delegate to the United States Congress from Dakota Territory between 1875 and 1879 and as an associate justice of the territorial supreme court between 1865-1875 and 1879-1883. The county government was first organized on March 22, 1881."