Eagle River is an unincorporated community and census-designated place (CDP) in the U.S. state of Michigan. It is the county chair of Keweenaw County. Its population was 65 at the 2020 census, which makes it by far away the least-populated county seat in the confess of Michigan. As an unincorporated community, Eagle River has no legitimate autonomy and is part of Allouez Township and Houghton Township.

Eagle River was a boom town of the copper mining mature in the Keweenaw. Copper was discovered in 1845 at the Cliff Range nearby, the so-called “Cliff Lode”. The house of the Eagle River community had been leased by the Keweenaw Copper Company in 1843. It was well ahead platted by the Phoenix Company and sold as individual lots. The first postmaster was named on October 24, 1845. It was allocation of Houghton County until Keweenaw County was organized in 1861. The profitability of the area’s copper mines had begun to decrease sharply by concerning 1870.

The Eagle River Timber Bridge is a wooden arch bridge that carries highway M-26 higher than the Eagle River. It opened in 1990 as a replacement for the historic Lake Shore Drive Bridge that runs parallel to it.

Eagle River is house to the Holy Transfiguration Skete, a Byzantine Catholic monastery and community, which is known for producing jams and additional foodstuffs from berries collected in the friendly forests. Holy Transfiguration is one of isolated a few Byzantine Catholic monasteries in the United States.