Jefferson County Missouri Genealogy Records

Jefferson County Missouri genealogy records reach back to 1819, when the county was organized from St. Louis and Ste. Genevieve Counties. Named for President Thomas Jefferson, the county seat is Hillsboro. Marriage and land records at the Recorder of Deeds start from 1819. Court records begin in 1825 and probate records in 1826. Jefferson County sits just south of St. Louis and has long been part of the broader St. Louis metropolitan research area. This guide explains where to find Jefferson County genealogy records, what each source holds, and how to access them in person and online.

Jefferson County Recorder of Deeds

The Jefferson County Recorder of Deeds is at 729 Maple Street, Hillsboro, MO 63050, phone 636-797-5414. Marriage records start from 1819 and land records from the same year. With over 200 years of property and marriage documentation, this office holds one of the longer runs of official county records in Missouri. Land records from the 1820s reflect the original settlement of the county by families moving west from the established St. Louis and Ste. Genevieve settlements along the Mississippi River.

Land records in Jefferson County can be especially complex because the county was part of the original French land grant system that predates American territorial government. Some early parcels were resurveyed and re-patented under the American system, which created multiple layers of documentation. For genealogists, this means land research here can require consulting both American federal patents and earlier French or Spanish colonial land claims. The Recorder's office holds American-era land records from 1819. Older colonial-era materials are typically found at the Missouri State Archives and through the Bureau of Land Management's General Land Office records. Marriage records from 1819 through the present document family formation across the full span of the county's American history.

Jefferson County Court and Probate Records

The Jefferson County Circuit Clerk holds court and divorce records from 1825 and probate records from 1826. The slight gap between the marriage and land records starting in 1819 and the court records starting in 1825 likely reflects the administrative buildup of the new county's judicial system. Probate records from 1826 include the estates of some of Jefferson County's earliest American settlers, making these documents genealogically rich for anyone tracing families from the county's founding generation.

Wills from the early nineteenth century in Jefferson County sometimes reflect the legal traditions of families who came from states like Virginia, Kentucky, and Tennessee. Many of those families were familiar with formal will-writing and named every heir explicitly. Estate inventories list household goods, farm animals, and tools. When an ancestor died intestate, the letters of administration and the list of heirs filed with the probate court serve the same genealogical function as a will. For cases filed after November 12, 2003, search Case.net online. Older records are at the Circuit Clerk in Hillsboro or on microfilm at the Missouri State Archives.

Vital Records in Jefferson County

The Jefferson County Health Department issues certified birth certificates from 1920 and death certificates from 1980. The County Clerk holds earlier vital registrations from 1883 to 1893. For statewide vital records from 1910 forward, the Missouri Bureau of Vital Records is the primary source. Call (573) 751-6387. Certified copies cost $15 each.

Death certificates for Jefferson County from 1910 through 1969 are free to search through Missouri Digital Heritage. With over 2.5 million statewide records in that database, Jefferson County is well represented. Each certificate can show the deceased's birthplace, parents' names, occupation, and burial location. Jefferson County's proximity to St. Louis means some families who died in the city but are buried in Jefferson County, or vice versa, may have records that cross county lines. The Missouri Bureau of Vital Records also holds Missouri's central marriage and divorce registry from July 1948.

Jefferson County Genealogy Libraries and Societies

The Jefferson County Library has four branch locations serving different parts of the county. The main branch at 1700 Allen Road, Arnold, MO 63010, phone 636-296-2204, is the largest. The Northwest Branch is at 5680 State Road PP, High Ridge, MO 63049, phone 636-677-8180. The Windsor Branch is at 7479 Metropolitan Blvd, Barnhart, MO 63012, phone 636-461-4474. The Herculaneum Public Library at 140 Joachim Ave, Herculaneum, MO 63048, phone 636-479-5900, serves the southern part of the county. These libraries collectively hold local history books, genealogy reference materials, and access to newspaper archives that cover Jefferson County communities.

The Jefferson County Historical Society at 106 S. 2nd Street, Festus, MO 63028, phone 636-933-3456, collects and preserves genealogy files and historical materials for the county. The Doris Spates Museum at the same address holds artifacts and documents related to Jefferson County history. The Sandy Creek Bridge Historical Association at P.O. Box 503, Hillsboro, MO 63050, focuses on the Hillsboro area and may hold records specific to families near the county seat. These local organizations often hold donated family papers that are not indexed anywhere and can only be found by direct contact with the society.

Online Jefferson County Records

The Jefferson County MOGenWeb page at mogenweb.org/jefferson provides free volunteer-contributed genealogy records for Jefferson County, Missouri. Cemetery transcriptions, marriage indexes, and local genealogy links are typically available there. This is a good starting point before making formal records requests or driving to Hillsboro.

The Missouri State Archives in Jefferson City holds extensive microfilm of Jefferson County records going back to 1819. The reading room at 600 W. Main St., Jefferson City, is open Monday through Friday and provides free on-site Ancestry.com access. Missouri Digital Heritage at sos.mo.gov/mdh offers free access to digitized death certificates, land patents, and other records covering Jefferson County. The State Historical Society of Missouri holds manuscript collections and newspaper archives from the Jefferson County area that can supplement official records with social and biographical context. FamilySearch has significant Missouri holdings and is free to use. The Missouri State Genealogical Association at P.O. Box 833, Columbia, maintains research guides and a surname index that can connect you with other researchers working on Jefferson County families.

The Jefferson County MOGenWeb page is a free online resource for Jefferson County Missouri genealogy, with volunteer-compiled records and research links.

The MOGenWeb page for Jefferson County Missouri provides cemetery records, transcribed documents, and research links compiled by volunteer genealogists for this county south of St. Louis.