Glennallen /ɡlɛˈnælən/ (Ciisik’e Na’ in Ahtna) is a census-designated place (CDP) in the Copper River Census Area[a] in the Unorganized Borough of the U.S. state of Alaska.

23, T004N, R002W, Copper River Meridian),[citation needed] in the Chitina Recording District and Game Management Unit 13.

In earlier times, the Ahtna Alaska Natives roamed the Copper River Valley in search of fish and game, both of which are usually plentiful there.

In 1899, the U.S. Army built a pack trail for summer use between the port of Valdez and Eagle, which passed through the Copper River Valley.

This made it difficult for the Germans to the west and the Japanese to the south of Russia to interfere with the supply operation.

This facility increased the population considerably by bringing to the region a number of staff and students from Holy Cross Mission in western Alaska.

The majority of downtown is connected to a piped sewage system operated by The Glennallen Improvement Corp.

The sewage system serves 52 homes and businesses, and is being expanded to the Alaska Bible College and the Glennallen Heights subdivision.

Most residences have individual septic tank systems, but permafrost and high water tables cause drainage failures.

Refuse collection services and the Class II permitted landfill are operated by Copper Basin Sanitation in Glennallen.

Copper Valley Electric purchases power from the state-owned Solomon Gulch Hydro Facility, and owns diesel plants in Glennallen and Valdez.

Prince William Sound Community College is located in Glennallen at mile 188 of the Glenn Highway.

There are no local hospitals, however there are 2 health clinics including Cross Road Medical Center, and the Copper River Native Association.

Local businesses serve area residents and tourism from the Glenn Highway traffic, supplies and services, schools and medical care.

The 17 miles (27 km) road to Lake Louise State Recreation Area is west of Glenallen on the Glenn Highway.

North of town on the Richardson Highway is the Dry Creek State Recreation Site, a 360 acres (150 ha) park with a large campground, trails, and fishing for trout.