[6] According to the 2010 census, Etna Green has a total area of 0.51 square miles (1.32 km2), all land.

[7] As of the census[9] of 2010, there were 586 people, 219 households, and 159 families living in the town.

There were 245 housing units at an average density of 480.4 per square mile (185.5/km2).

23.3% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older.

There were 251 housing units at an average density of 534.3 per square mile (206.3/km2).

21.4% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older.