Gardena is a city in Bottineau County, North Dakota, United States.

According to the United States Census Bureau, the city has a total area of 0.33 square miles (0.85 km2), all land.

There were 21 housing units at an average density of 65.6 per square mile (25.3/km2).

23.1% of all households were made up of individuals, and 7.7% had someone living alone who was 65 years of age or older.

There were 21 housing units at an average density of 63.9 per square mile (24.7/km2).

30.8% of all households were made up of individuals, and 15.4% had someone living alone who was 65 years of age or older.