Cornish Americans in the context of "Upper Peninsula of Michigan"

British Americans usually refers to Americans whose ancestral origin originates wholly or partly in the United Kingdom (England, Scotland, Wales, and Northern Ireland and also the Isle of Man, the Channel Islands, and Gibraltar). It is primarily a demographic or historical research category for people who have at least partial descent from peoples of Great Britain and the modern United Kingdom, i.e. English, Scottish, Welsh, Scotch-Irish, Orcadian, Manx, Cornish Americans and those from the Channel Islands and Gibraltar.

Based on 2020 American Community Survey estimates, 1,934,397 individuals identified as having British ancestry, while a further 25,213,619 identified as having English ancestry, 5,298,861 Scottish ancestry and 1,851,256 Welsh ancestry. The total of these groups, at 34,298,133, was 10.5% of the total population. A further 31,518,129 individuals identified as having Irish ancestry, but this is not differentiated between modern Northern Ireland (part of the United Kingdom) and the Republic of Ireland, which was part of the United Kingdom during the greatest phase of Irish immigration. Figures for Manx and Cornish ancestries are not separately reported, although Manx was reported prior to 1990, numbering 9,220 on the 1980 census, and some estimates put Cornish ancestry as high as 2 million. This figure also does not include people reporting ancestries in countries with majority or plurality British ancestries, such as Canadian, South African, New Zealander (21,575) or Australian (105,152). There has been a significant drop overall, especially from the 1980 census where 49.59 million people reported English ancestry and larger numbers reported Scottish, Welsh and Northern Irish ancestry also.

The Upper Peninsula of Michigan—also known as Upper Michigan or colloquially the U.P. or Yoop—is the northern and more elevated of the two major landmasses that make up the U.S. state of Michigan; it is separated from the Lower Peninsula by the Straits of Mackinac. It is bounded primarily by Lake Superior to the north, separated from the Canadian province of Ontario at the east end by the St. Marys River, and flanked by Lake Huron and Lake Michigan along much of its south. Although the peninsula as a geographic feature extends into the state of Wisconsin, the state boundary follows the Montreal and Menominee rivers and a line connecting them.

First inhabited by Algonquian-speaking native American tribes, the area was explored by French colonists, then occupied by British forces, before being ceded to the newly established United States in the late 18th century. After being assigned to various territorial jurisdictions, it was granted to the newly formed state of Michigan as part of the settlement of a dispute with Ohio over the city of Toledo. The region's exploitable timber resources and the discovery of iron and copper deposits in the 19th century brought immigrants, especially Finnish, French Canadian, Swedish, Norwegian, Cornish, and Italian; the peninsula includes the only counties in the United States where a plurality of residents claim Finnish ancestry. The area's economy declined in the 20th century when all of the readily available minerals had been removed, and it became largely dependent on logging and tourism.