PIATT COUNTY, IL HISTORY AND LOOKUP

County History Books

Past and Present of Piatt County, Illinois by Charles Mcintosh, (1903) – 520 Pages
Source: Internet Archive
Book ID: CH.2023.12.08.0595.CD.AR

History of Piatt County, Illinois by Emma C Piatt, (1883) – 660 Pages
Source: Internet Archive
Book ID: CH.2024.12.08.092.CD.AR

American Aerial County History Series: Piatt County by John Drury (1954) – 248 Pages
Source: Internet Archive
Book ID: CH.2025.09.22.1830.AR

Piatt County, Illinois: A Genealogical Overview

Located in the heart of central Illinois, Piatt County is a quintessential prairie county, characterized by its rich, flat farmland and the Sangamon River which flows through it. Its history is deeply rooted in 19th-century agriculture and westward expansion. The county is also notable for its connection to Abraham Lincoln, who practiced law as a circuit-riding attorney in the county seat, Monticello, before his presidency.

I. County Formation and Evolution

Understanding Piatt County’s formation from two parent counties is the first step for researchers seeking the earliest records for ancestors who settled in this part of Illinois.

  • 1841: County Formed: Piatt County was established on January 27, 1841.
  • Parent County: It was created from the northern portion of Macon County and the southern portion of DeWitt County. Records for settlers in this area prior to 1841 must be sought in the records of these two parent counties.
  • Subsequent County Formations: The boundaries of Piatt County have remained stable since its formation in 1841. It has not been partitioned to create other counties.
  • Name Origin: The county was named for James A. Piatt, Sr., an early and influential settler from a prominent pioneer family in the region.
  • County Seat History: The county seat has always been Monticello. It was designated as the seat of government upon the county’s formation and has remained so ever since.

II. Settlement and Early History

  • Early Inhabitants: Before European settlement, the land that would become Piatt County was the territory of several Native American groups, primarily the Kickapoo, Potawatomi, and Miami peoples.
  • Pioneer Settlement and Economy: The first significant wave of non-native settlement began in the late 1820s and intensified in the 1830s, with pioneers arriving primarily from Ohio, Indiana, and Kentucky. The economy was, and largely remains, driven by agriculture. The fertile prairie soil proved ideal for corn and soybean cultivation. The arrival of railroads in the 1850s was transformative, connecting local farms to national markets and spurring the growth of towns like Bement, Cerro Gordo, and Atwood.

III. Genealogical Records and Resources

This section provides practical information for locating ancestral records specific to Piatt County.

  • Courthouse: Piatt County Courthouse, 101 W. Washington Street, Monticello, IL 61856. Key offices for genealogists are located here. The Piatt County Clerk is the repository for vital records (birth, marriage, death) and land records (deeds). The Clerk of the Circuit Court holds court records, including probate (wills and estates) and civil cases.
  • Vital Records:
    • Birth and Death Records: Statewide registration in Illinois began in 1916. County-level recording began earlier, around 1877, but can be incomplete. For records from 1877 forward, contact the Piatt County Clerk. For records after 1916, they can also be obtained from the Illinois Department of Public Health.
    • Marriage Records: Marriage records in Piatt County are generally available from the county’s formation in 1841 to the present. These are held by the Piatt County Clerk.
  • Libraries with Genealogy Collections:
    • Piatt County Historical and Genealogical Society: Located at the Piatt County Museum, 315 W. Main St., Monticello, IL 61856. This is the premier local resource for family history, holding family files, local histories, and other unique collections.
    • Allerton Public Library: Located at 201 N. State St., Monticello, IL 61856. This library has a strong local history collection and is another key research stop. Other public libraries in Bement, Cerro Gordo, and Atwood also maintain local history materials.
    • Abraham Lincoln Presidential Library: (Located in Springfield) As a major state repository, this library is an essential resource for Illinois genealogy, holding extensive newspaper collections, state records, and manuscripts.
  • Bordering Jurisdictions:
    • Champaign County, IL
    • DeWitt County, IL
    • Macon County, IL
    • McLean County, IL
    • Moultrie County, IL

Please share any resources you have and will do lookups or links to resources you are aware of. Thanks