Frösö Runestone, Norse runestone in Frösö parish, Sweden.

The Frösö Runestone is a granite runestone with runes carved in a loop, now standing by Hornsbergskyrkan about 100 metres from its original site at the tip of Frösön. It was split in two during its move and the crack across the stone is still visible.

The stone was created between 1030 and 1050 and records the Christianization of Jämtland through an inscription commissioned by Austmaðr. This period marked a turning point in the region's shift from pagan traditions to Christianity.

The inscription represents the first written record in the ancient Jamtlandic dialect and contains the earliest documented mention of Jämtland. It reflects a moment when the region adopted the Christian faith.

The stone stands by Hornsbergskyrkan on Frösön, about 100 metres from its original site at the Östersund sound. It was moved here when the new bridge and traffic link were built between 1969 and 1971, and it cracked in two during the move; the fissure across the stone is still visible.

The stone was not a grave marker: it commemorates Austmaðr's Christianisation of Jämtland and the bridge built by Ásbjörn. It also holds the earliest written record of the name Jamtaland, the land of the jamtar.