Eagle River is a community within the Municipality of Anchorage situated on the Eagle River, for which it is named, between Joint Base Elmendorf-Richardson and Chugach State Park in the Chugach Mountains. Its ZIP code is 99577. Settled by homesteaders, Eagle River has been annexed to the Municipality of Anchorage since the 1970s—a relationship that is, at times, complicated. On the one hand, Eagle River functions as an Anchorage suburb, with a number of Eagle River residents working in, shopping or participating in community life in the Anchorage bowl. Much of the community is also made up of residents from nearby Joint Base Elmendorf-Richardson. On the other hand, the community is itself a significant business hub between Wasilla and Anchorage, offering shopping, restaurants, recreation and employment. Secession efforts have from time to time gained traction by residents who would like Eagle River legally regarded as a separate community. Eagle River also has a close relationship with its neighboring community to the north, Chugiak, with which it shares some history. If Eagle River were not part of the Municipality of Anchorage, it would be classified as one of the five largest cities in Alaska.
The Eagle River (and Chugiak) area was settled by homesteaders and prospered on agricultural activities.