Courtenay is a city in Stutsman County, North Dakota, United States.

According to the United States Census Bureau, the city has a total area of 0.44 square miles (1.14 km2), all land.

38.1% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older.

37.5% of all households were made up of individuals, and 20.8% had someone living alone who was 65 years of age or older.

There were no families and 5.6% of the population living below the poverty line, including no under eighteens and 33.3% of those over 64.

This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters.