John Whitfield Bunn was an American corporate leader, financier, industrialist, and personal friend of Abraham Lincoln, whose work and leadership involved a broad range of institutions ranging from Midwestern railroads, international finance, and Republican Party politics, to corporate consultation, globally significant manufacturing, and the various American stock exchanges. He was of great historical importance in the commercial, civic, political, and industrial development and growth of the state of Illinois and the American Midwest, during both the nineteenth century and the twentieth century. John Whitfield Bunn was born June 21, 1831, in Hunterdon County, New Jersey. Although every one of the business institutions co-founded or built by the Bunn Brothers has ceased to exist, and fallen purely into the realm of history, each of these businesses left an important legacy of honorable industrial, commercial, and civic vision for Illinois, the Midwest, and the United States.

Sangamon County is a county located in the center of the U.S. state of Illinois. According to the 2020 census, it had a population of 196,343. Its county seat and largest city is Springfield, the state capital.