Manning is a census designated place (CDP) in and the county seat of Dunn County, North Dakota, United States. An unincorporated community, it was designated as part of the U.S. Census Bureau's Participant Statistical Areas Program on March 31, 2010. It was not counted separately during the 2000 Census, but was included in the 2010 Census, where a population of 74 was reported. Its ZIP Code is 58642.