Etna is a census-designated place (CDP) in Lincoln County, Wyoming, United States.

According to the United States Census Bureau, the CDP has a total area of 2.0 square miles (5.1 km2), all land.

As of the census[1] of the year 2000, there were 123 people, 44 households, and 34 families residing in the CDP.

There were 19.4% of families and 24.5% of the population living below the poverty line, including 17.1% of under eighteens and 48.1% of those over 64.

Public education in the community of Etna is provided by Lincoln County School District #2.