| Etna, Nebraska | |
| Settlement Type: | Unincorporated Community |
| Pushpin Map: | USA Nebraska#USA |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Custer |
| Established Title: | Founded |
| Elevation Ft: | 2802 |
Etna (formerly Etha) is an unincorporated community in Custer County, Nebraska, United States. It lies at an elevation of .
A post office was established at Etna in 1885, and remained in operation until it was discontinued in 1921.[1] Etna no longer exists, a simple roadside marker indicates the location of the former town. The school survived until 1966, but most other establishments (general store, post office, etc.) closed in 1931. There is a mailbox next to the marker with a book of historical information about Etna and a guest book to sign.