ILLINOIS STATE ARCHIVES
200 S. 9th St.
Springfield, IL 62701-1629
217-753-6700 — County Clerk
217-753-6674 — Circuit Clerk
217-535-3150 — Recorder
University of Illinois at Springfield
One University Plaza, MS BRK 140
Springfield IL 62703-5407
January 30, 1821 (Laws, 1821, p. 45)
Origin of the name of the county
Named after the Sangamon River which flows through the county which derived its name from the Pottawatomie Indian word Sain-guee-mon or Sangamon (pronounced sang gä mun) meaning literally "where there is plenty to eat" or what we would call the "land of milk and honey."
Present area, or parts of it, formerly included in
1817–1821 — Bond
1812–1821 — Madison
1790–1812 — St. Clair
1790–1801 — Knox, Northwest Territory
1821–1825 — Springfield—Temporary designation.
1825– — Springfield—Permanent designation.
History of county governing board
1821–1849 — County Commissioners’ Court
1849–1861 — County Court
1861– — County Board of Supervisors
Adopted — November 6, 1860
Capital — Formed from Springfield on July 1, 1877; on February 17, 1892, the limits of Capitol Township were made co-extensive with the limits of the City of Springfield.
Chatham — Name changed from Campbell on September 2, 1863.
Divernon — Formed from Pawnee (date unknown, before 1921.)
Fancy Creek — Name changed from Power on September 11, 1861.
Lanesville — Formed from Illiopolis (date unknown, before 1921.)
Maxwell — Formed from Loami (date unknown, before 1921.)
New Berlin — Formed from Island Grove on March 3, 1869.
Salisbury — Name changed from Sackett on September 9, 1867.
Federal Township Plats of Illinois
Illinois Public Domain Land Tract Sales Database
Illinois Statewide Death Index, 1916–1950
Illinois Statewide Marriage Index
Local Governmental Records Database
Name Index to Illinois Local Governments
Sangamon County Guardian's Case Files Index (1825–1901)
Sangamon County Probate Case Files Index (1821–1906)