Carpio is a city in Ward County, North Dakota, United States.

It is commonly believed that the town was named after the first post office which operated out of a railcar - hence 'Car P.O.'.

[5] According to the United States Census Bureau, the city has a total area of 0.59 square miles (1.53 km2), all land.

36.6% of all households were made up of individuals, and 12.7% had someone living alone who was 65 years of age or older.

37.3% of all households were made up of individuals, and 16.4% had someone living alone who was 65 years of age or older.

There were 10.8% of families and 11.2% of the population living below the poverty line, including 11.4% of under eighteens and 12.2% 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.