Logan County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 1,876. Its county seat is Napoleon.

John Alexander Logan was an American soldier and politician. He served in the Mexican–American War and was a general in the Union Army in the American Civil War. He served the state of Illinois as a state Representative, a U.S. Representative, and a U.S. Senator and was an unsuccessful candidate for Vice President of the United States as James G. Blaine's running mate in the election of 1884. As the 3rd Commander-in-Chief of the Grand Army of the Republic, he is regarded as the most important figure in the movement to recognize Memorial Day as an official holiday.