Sangamon County is located in the central part of the state of Illinois. It is the sixth most populous county in the state, with a population of 197,465 as of the 2019 census. The county seat is Springfield, the state capital.

The county was established in 1821 and is named after the Sangamon River, which runs through it. The county government is composed of a board of commissioners, elected from single-member districts, and a county executive. The county is divided into 24 townships, and there are also several incorporated cities and villages.

The county is home to several state parks, including Lincoln's New Salem State Historic Site, Lincoln's Tomb State Historic Site, and Sangchris Lake State Park. The county is also home to the University of Illinois at Springfield, Lincoln Land Community College, and several other higher education institutions.

The economy of Sangamon County is largely based on government, education, and health care. Major employers include the State of Illinois, the City of Springfield, Memorial Medical Center, and the University of Illinois at Springfield.

For the most up-to-date and in-depth information, please check the public records links below.