Traill County, North Dakota
Traill County is a county in the U.S. state of North Dakota. As of the 2020 census, the population at 7,997, and was estimated to be 7,920 in 2025. The county seat is Hillsboro and the largest city is Mayville.
Traill County is a county in the U.S. state of North Dakota. As of the 2020 census, the population at 7,997, and was estimated to be 7,920 in 2025. The county seat is Hillsboro and the largest city is Mayville.