Buffalo is a city in Cass County, North Dakota, United States.

[7] According to the United States Census Bureau, the city has a total area of 0.481 square miles (1.25 km2), all land.

There were 101 housing units at an average density of 439.1 per square mile (169.5/km2).

39.1% of all households were made up of individuals, and 19.5% had someone living alone who was 65 years of age or older.

35.4% of all households were made up of individuals, and 26.0% had someone living alone who was 65 years of age or older.

None of the families and 6.0% of the population were living below the poverty line, including no under eighteens and 8.7% of those over 64.

[9] The former Buffalo High School is on the National Register of Historic Places.