Adams County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 2,200. The county seat is Hettinger. The county was created on April 17, 1907, and organized one week later. It was named for John Quincy Adams, a railroad official for the Milwaukee Road Railroad and distant relative of sixth U.S. President John Quinc…Adams County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 2,200. The county seat is Hettinger. The county was created on April 17, 1907, and organized one week later. It was named for John Quincy Adams, a railroad official for the Milwaukee Road Railroad and distant relative of sixth U.S. President John Quincy Adams. In 1923, Adams County was the site of one of the deadliest tornadoes in North Dakota's recorded history. The "Adams County Twister' killed eight people and injured 20.