All historical knowledge is from the book, Our Golden History-South Beloit Illinois, which is a non-copyrighted work by Cathryn Hayes.

What is now South Beloit was previously full of natural resources such as copper, lead, and bog iron.

The buff limestone gave the first settlers material for their houses and public buildings, some of which can still be seen in Rockford, Rockton, and Beloit/South Beloit.

The South Beloit area has a thick deposit of sand, and industries were built here because of its unusually fine quality.

Many Peoples have inhabited South Beloit over the years, including the Mound Builders, Sioux, and Illinswek (Illinois).

In 1818, Congress told the people of the Illinois Territory to draft a constitution and adopt a state government.

A heated debate arose over the correct placement of the northern state line of Illinois.

[citation needed] Illinois had become a state in 1818, Winnebago County was organized in January 1836, and public surveys started in the fall of 1836.

The early settlers held the land by squatters’ rights and were now able to buy their farms from the government for $1.25 an acre.

The people living there disapproved of the $14,000,000 debt for internal improvements with an empty treasury and insufficient revenue.

The committee members, remembering a happy time in Detroit, sounded the word for pretty and came up with Balloit, then Beloit.

The first group of volunteers met in fall, 1927 and, with the help of Beloit firemen, learned how to use the equipment and effectively fight fires.

Knott, was manufactured in Minneapolis and delivered in February 1928 by Clare Hillman, who was familiar with its operation and became the first fire chief.

These early volunteers were Edward Brady, George Graves, George Holtz, Arthur Schultz, David Bliss, James Howard, John Jensen, Thomas Flanigan, Robert Smith, Everett Clussman, Erwin Earl, and Fay Hanson.

Mrs. Marguerite Warren, a teacher long ago in South Beloit, compiled a list of some of the students that went to the old Butler School.

The Clarks, Stantons, Hutchisons, Herseys, Hayeses, Helms, and HaPBC Linear (Pacific Bearing) South Beloit's economy has benefited from the legalization of cannabis in Illinois due to its location on the Illinois-Wisconsin state line, as cannabis remains illegal in Wisconsin.

The city has received a significant amount of tax revenue since the opening of the town's first recreational cannabis dispensary in 2020.

[8] The city's economy is only expected to further benefit from this industry as a second dispensary was opened along the state line in January 2025.

[12] South Beloit was served by the Milwaukee Road with lines running between Davis Junction and Janesville and Racine and Kittredge.