Etna, originally named "Mill Village", is a small unincorporated community within the town of Hanover, New Hampshire, in the United States. It is located in southwestern Grafton County, approximately 3 miles (4.8 km) east of Hanover's downtown and 2.5 mi (4.0 km) south of the village of Hanover Center, on Mink Brook. Etna has a separate ZIP code (03750) from the rest of Hanover, as well as its own fire station, church, and library.
Commerce revolves around the Etna General Store and the Etna Post Office for the 814 residents and occasional visitor in what a small blue-and-white sign in a yard along the main road humorously calls "Metropolitan Downtown Etna". The Appalachian Trail passes a mile or so north of the village before it turns northeast to cross Moose Mountain on its way to Lyme. Etna can be accessed from NH Rt. 120 via the Greensboro Road or Great Hollow Road (Etna Road, north of the Lebanon exit from Interstate 89), or from Hanover via Trescott Road (E. Wheelock Street).
Etna was the site of the 2001 murders of Dartmouth College professors Half and Susanne Zantop, dubbed the Dartmouth Murders.
Every summer, the village holds the Old Timer's fair on the Hanover Center green, 2 miles (3 km) north of the center of Etna. For many years, Dave Laware, former operator of the Etna General Store, organized a parade consisting of local residents riding Harley-Davidson motorcycles (along with the Etna Fire Department trucks and other colorful vehicles), with their children riding behind them scattering candy to the crowd. The legend "Etna General Store - Warm Beer, Lousy Food, Poor Attitudes" appeared on shirts worn by all of the riders.