Etna Green was laid out in 1853. It took its name from Etna Township. The Etna Green post office was established in 1854.
Geography
Etna Green is located at . According to the 2010 census, Etna Green has a total area of, all land.
Demographics
2010 census
As of the census of 2010, there were 586 people, 219 households, and 159 families living in the town. The population density was. There were 245housing units at an average density of. The racial makeup of the town was 97.8% White, 0.5% African American, 0.3% Native American, 0.3% Asian, 0.5% from other races, and 0.5% from two or more races. Hispanic or Latino of any race were 2.4% of the population. There were 219 households of which 37.0% had children under the age of 18 living with them, 52.5% were married couplesliving together, 11.4% had a female householder with no husband present, 8.7% had a male householder with no wife present, and 27.4% were non-families. 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. The average household size was 2.64 and the average family size was 3.09. The median age in the town was 35.9 years. 27.3% of residents were under the age of 18; 9.4% were between the ages of 18 and 24; 24.8% were from 25 to 44; 26.7% were from 45 to 64; and 11.9% were 65 years of age or older. The gender makeup of the town was 49.8% male and 50.2% female.
2000 census
As of the census of 2000, there were 663 people, 234 households, and 165 families living in the town. The population density was 1,411.3 people per square mile. There were 251 housing units at an average density of 534.3 per square mile. The racial makeup of the town was 96.98% White, 0.45% African American, 0.30% Native American, 0.75% Asian, 1.21% from other races, and 0.30% from two or more races. Hispanic or Latino of any race were 2.87% of the population. There were 234 households out of which 42.3% had children under the age of 18 living with them, 52.6% were married couples living together, 13.7% had a female householder with no husband present, and 29.1% were non-families. 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. The average household size was 2.80 and the average family size was 3.33. In the town, the population was spread out with 33.3% under the age of 18, 8.1% from 18 to 24, 30.3% from 25 to 44, 17.6% from 45 to 64, and 10.6% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 102.8 males. For every 100 females age 18 and over, there were 92.2 males. The median income for a household in the town was $35,625, and the median income for a family was $35,139. Males had a median income of $34,000 versus $21,339 for females. The per capita income for the town was $14,110. About 3.1% of families and 4.9% of the population were below the poverty line, including 2.6% of those under age 18 and 9.2% of those age 65 or over.
