Cathay is a city in Wells County, North Dakota, United States.

[5] According to the United States Census Bureau, the city has a total area of 0.18 square miles (0.47 km2), all land.

There were 29 housing units at an average density of 161.1 per square mile (62.2/km2).

31.6% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.

33.3% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older.

There were 5.3% of families and 11.4% of the population living below the poverty line, including no under eighteens and 16.7% of those over 64.