| Official Name: | Etna, Ohio |
| Settlement Type: | Census-designated place |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Licking |
| Subdivision Type3: | Township |
| Subdivision Name3: | Etna |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.60 |
| Area Land Km2: | 1.59 |
| Area Water Km2: | 0.01 |
| Area Total Sq Mi: | 0.62 |
| Area Land Sq Mi: | 0.61 |
| Area Water Sq Mi: | 3.11 |
| Population As Of: | 2020 |
| Population Total: | 1209 |
| Population Density Km2: | 759.11 |
| Population Density Sq Mi: | 1965.85 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1070 |
| Coordinates: | 39.9544°N -82.6878°W |
| Postal Code Type: | ZIP Code |
| Postal Code: | 43062 (Pataskala) |
| Blank Name: | FIPS code |
| Blank Info: | 39-25676[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2633229 |
Etna (formerly Carthage) is an unincorporated community and census-designated place (CDP) in Licking County, Ohio, United States. As of the 2020 census it had a population of 1,209. It lies at an elevation of at the intersection of U.S. Route 40 and State Route 310.[3] It was listed as a census-designated place in 2010.
Etna was originally called "Carthage", under which name it was laid out in 1832 when the National Road was being built to that point.[4] The present name is derived from Etna Township.[5] A post office called Etna has been in operation since 1833.[6]
Etna is in southwestern Licking County, in the center of Etna Township. U.S. Route 40 forms the northern edge of the community, and Interstate 70 forms the southern edge. Access from I-70 is via Exit 118 (State Route 310). Both US 40 and I-70 lead west to Columbus and east to Zanesville. Newark, the Licking county seat, is to the northeast.
According to the U.S. Census Bureau, the Etna CDP has a total area of 1.7sqkm, of which 0.1sqkm, or 0.65%, are water.[2] Etna's surface area drains northeast to the South Fork of the Licking River, an east-flowing tributary of the Muskingum River and part of the Ohio River watershed.