Wisconsin is a state located near the center of the North American continent. It touches two of the five Great Lakes and is one of the fifty states that constitutes the United States of America. Wisconsin's capital is Madison, and its largest city is Milwaukee. The name Wisconsin may come from an ancient Ojibwe word, Miskwasiniing, meaning "Red-stone place," which was probably the name given to the Wisconsin River, and was recorded as Ouisconsin by the French. The spelling was revised to its current form in 1845 by Wisconsin's territorial lesgislature.

The modern Ojibwe name, however, is Wiishkoonsing or Wazhashkoonsing, meaning "muskrat-lodge place" or "little muskrat place." Other theories are that the name comes from words meaning "Gathering of the Waters" or "Great Rock." Originally, Ouisconsin was applied to the Wisconsin River, and later to the area as a whole when Wisconsin became a territory.

The Wisconsin Territory separated from the Michigan Territory in 1836. Wisconsin became the 30th state on May 29, 1848.

Since its founding, Wisconsin has been ethnically heterogeneous, with Yankees being among the first to arrive from New York and New England. They dominated the state's heavy industry, finance, politics and education. Large numbers of European immigrants followed them, including Germans, mostly between 1850 and 1900, Scandinavians (the largest group being Norwegian) and smaller groups of Belgians, Dutch, Swiss, Finns, Irish and others; in the 20th century, large numbers of Poles and African Americans came, settling mainly in Milwaukee.

Today, 42.6% of the population is of German ancestry, making Wisconsin one of the most German-American states in the United States. Numerous ethnic festivals are held throughout Wisconsin to celebrate its heritage. Such festivals are world renowned, and include Oktoberfest, Festa Italiana, Bastille Days, Syttende Mai (Norwegian Constitution Day), Summerfest, Cheese Days (Monroe, WI), African World Festival, Indian Summer, Irish Fest and many others.

The first known inhabitants of what is now Wisconsin were the Paleo-Indians, who first arrived in the region in about 10,000 BC. They used primitive weapons to hunt animals such as mammoths and mastodons. The Boaz mastodon, and the Clovis artifacts discovered in Boaz, Wisconsin, show that hunting was the primary occupation for these people. The Plano culture began to dominate Wisconsin around 7000 BC, as the last glaciers retreated from the state. During the Archaic stage, from 6,000 – 1,000 BC, Wisconsin was inhabited by the Boreal Archaic and the Old Copper Indians. People during this time lived in small groups or bands, and continued to depend on hunting for their existence.

In 1634, Frenchman Jean Nicolet became Wisconsin's first European explorer, landing at Red Banks, near modern-day Green Bay in search of a passage to the Orient. The French controlled the area until it was ceded to the British in 1763.

Wisconsin was part of the Northwest Territory from 1788 to 1800. It was then governed as part of Indiana Territory (1800-1809), Illinois Territory (1809-1818), and Michigan Territory (1818-1836). Settlement began when the first two public land offices opened in 1834. Wisconsin Territory was organized on July 3, 1836, and it became the 30th state on May 29, 1848.

The state mineral is galena, otherwise known as lead sulfide, which reflects Wisconsin's early mining history. Many town names, such as Mineral Point, recall a period in the 1820s, 1830s, and 1840s, when Wisconsin was an important mining state. When Indian treaties opened up southwest Wisconsin to settlement, thousands of miners — many of them immigrants from Cornwall, England — joined the "lead rush" in southwestern areas. At that time, Wisconsin produced more than half of the nation's lead; Belmont, in the lead region, was briefly the state capital. By the 1840s, the easily accessible deposits were worked out, and experienced miners were drawn away to the California Gold Rush. This period of mining before and during the early years of statehood led to the state's nickname, the "Badger State." Many miners and their families lived in the mines in which they worked until adequate above-ground shelters were built, and were thus compared to badgers.

In the 1830-60 period, large numbers of Yankees from New England and New York flocked to Wisconsin. The New Yorkers were influential in bringing dairy farming to the state. As New York was the leading dairy state at the time, migrants from there brought with them the skills needed for dairy farming, as well as butter and cheese production.

Other Yankees settled in towns or cities where they set up businesses, factories, mills, banks, schools, libraries, colleges, and voluntary societies. They created many Congregational, Presbyterian and Methodist churches that still exist. The Yankees created the Republican party in 1854—the first local meeting in the country came in Ripon. They gave strong support to the Civil War effort, as well as to reforms such as abolition, women's suffrage and, especially, prohibition.

Even larger numbers of Germans arrived, so that the state became over one-third German. Most became farmers; others moved to Milwaukee and smaller cities setting up breweries and becoming craftsmen, machinists and skilled workers who were in high demand as the state industrialized. The Germans were split along religious lines. Most Germans were Catholic or Lutheran, with some Lutherans forming the Wisconsin Synod and others joining the Missouri Synod. The Catholics and Lutherans created their own network of parochial schools, through grade 8. Smaller numbers of Germans were Methodists, Jews, or Freethinkers (especially intellectual refugees). Politically they tended toward the Democratic party, but 30-40% voted Republican. Whenever the Republicans seemed to support prohibition, they shifted toward the Democrats. When nativist Republicans, led by governor William Hoard, passed the Bennett Law in 1889 that would eliminate instruction in the German language, German-Americans revolted and helped elect the Democrats in 1890. In World War I, German culture came under heavy attack in Wisconsin. Senator LaFollette became their protector and Germans strongly supported his wing of the Republican party after that.

Scandinavians comprise the third largest ethnic block, with Norwegians, Danes, Swedes, and Finns becoming farmers and lumberjacks in the western and northern districts. A large Danish settlement in Racine was the only large urban presence. The great majority were Lutheran, of various synods. The Scandinavians supported Prohibition and voted Republican; in the early 20th century they were the backbone of the LaFollette movement. Irish Catholics came to Milwaukee and Madison and smaller cities as railroad workers. They quickly became prominent in local government and in the Democratic party. They wrestled with the German Catholics for control of the Catholic church in the state.