John Bremner (1833–1887) was a prospector and early explorer of Alaska.
John Bremner was born in Rhynie, Aberdeenshire, Scotland, and emigrated to Iowa. At some point he abandoned his farm and family and probably worked as a sailor.
In 1884 he was first recorded as living among on the Copper River (Alaska), the only white man living in an area inhabited at the time by the Copper Indians, or Yellowknives. In the summers he prospected for gold. In 1884–85 he wrote a diary about his time living through the winter on the Copper River in a cabin with an Indian wife amongst the Copper River Indians (referred to him as "Ma Nuska") which was transcribed into the book Shores and Slopes of Alaska, pp. 200–21.
In early 1885 John Bremner joined the expedition of Lt. Henry Tureman Allen, a West Point graduate, traveling 1,500 miles (2,400 km) with Lt. Allen, Pvt. Frederick W. Fickett, Sgt. Cody Robertson, and fellow prospector Peder Johnson, through previously unexplored territory along the Copper, Tanana, and Koyukuk Rivers. On March 29, 1885, the party left Taral to ascend the previously unexplored Copper River. After a side trip up the Chitina River to the head of that river, they continued up the Copper to the Slana River. They traveled to the source of the Slana and then downstream on the Tetlin and Tanana rivers to the Yukon. In the Fall of 1886 Johnson and Bremner decided to stay in the town of Nuklukyet on the Yukon (today known as Old Station, 17 miles (27 km) below the town of Tanana) while the others continued. Lt. Allen and Pvt. Fickett portaged to the Kanuti and Koyukuk rivers upstream, traveled downstream to the Yukon, portaged to the Unalakleet and from there went downstream to St. Michael. Their journey was “subsequently praised as one of the greater explorations in the history of North America.” Allen Glacier and Mt. Allen, near the head of the Tanana, are named for the party's leader.
John Bremner may refer to: