Tappen is a city in Kidder County, North Dakota, United States.

The city was named for Sheppard Tappen, a local landowner.

[6] According to the United States Census Bureau, the city has a total area of 1.05 square miles (2.72 km2), all land.

34.8% of all households were made up of individuals, and 8.9% had someone living alone who was 65 years of age or older.

35.2% of all households were made up of individuals, and 13.6% had someone living alone who was 65 years of age or older.

About 5.2% of families and 10.1% of the population were below the poverty line, including 6.8% of those under the age of eighteen and 11.4% of those 65 or over.

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