McHenry is a city in Foster County, North Dakota, United States.

According to the United States Census Bureau, the city has a total area of 0.26 square miles (0.67 km2), all land.

29.0% of all households were made up of individuals, and 19.4% had someone living alone who was 65 years of age or older.

22.2% of all households were made up of individuals, and 19.4% had someone living alone who was 65 years of age or older.

There were 4.3% of families and 16.7% of the population living below the poverty line, including 100.0% of under eighteens and 5.4% 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.