Cogswell is a city in Sargent County, North Dakota, United States.

According to the United States Census Bureau, the city has a total area of 0.33 square miles (0.85 km2), all land.

There were 73 housing units at an average density of 221.2 per square mile (85.4/km2).

38.0% of all households were made up of individuals, and 14% had someone living alone who was 65 years of age or older.

27.9% of all households were made up of individuals, and 17.6% had someone living alone who was 65 years of age or older.

About 1.8% of families and 2.5% of the population were below the poverty line, including none of those under the age of eighteen and 7.1% of those 65 or over.