Osage County, Missouri Genealogy

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United States Gotoarrow.png Missouri Gotoarrow.png Osage County

Guide to Osage County Missouri genealogy. Birth records, marriage records, death records, census records, family history, and military records.

Hand and keyboard.jpg Missouri
Online Records

Osage County, Missouri
Map of the U.S. highlighting Missouri
Location of Missouri in the U.S.
Founded January 29, 1841
County Seat Linn
Address Osage County Courthouse
106 E Main Street
Linn, MO 65501
Phone: 573.897.2139
Osage County Website

County Courthouse

Recorder Deeds has marriage and land records from 1841;
probate courth has probate records from 1841; County
Clerk has birth and death records[1]


Osage County is a county located in the U.S. state of Missouri. The county was named for the Osage River. As of 2000, the population was 13,062. Its county seat is Linn[1]. The center of population of Missouri is located in Osage County, in the city of Westphalia[2]

Parent County

1841--Osage County was created 29 January 1841 from Gasconade County. County seat: Linn [3]

Boundary Changes

See an interactive map of Osage County border changes at N2Genealogy.

Record Loss



Belle · Bland · Chamois · Linn · Meta · Westphalia

          To see a list of places in Osage County, click on [Show], in the bar above.

Osage County Historical Society has information on historic places from Gasconade, Maries & Osage Counties including sources and links to historic maps. Also see: The Ramsay Place Names File for Osage County. (State Historical Society of Missouri)






Local Histories


Maps of townships (Histopolis)

The University of Missouri Digital Library has digital copies of Missouri county plat books (ca. 1930) for all Missouri counties including Osage County. The city of St. Louis is not included in this collection.



Newspaperarchive.com ($) has historical newspapers available on-line. Their database has Jefferson City newspapers from the early 1900's that covered local news on residents from Osage County communities.



Vital Records

  • 1841-1875 - Osage County Marriage Index 1841-1875. Batch M515531 at FamilySearch - free.[4]
  • 1875-1885 - Osage County Marriage Index 1875-1885. Batch M515532 at FamilySearch - free.[4]

Societies and Libraries

Osage County Historical Society
P.O. Box 402
Linn, MO 6505
Website: http://www.osagecounty.org/

Family History Centers

Web Sites

  • USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.
  • Family History Library Catalog


  1. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Osage County, Missouri. Page 403 At various libraries (WorldCat); FHL Book 973 D27e 2002.
  2. http://www.census.gov/geo/www/cenpop/statecenters.txt
  3. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  4. 4.0 4.1 4.2 4.3 Genealogical Society of Utah, Parish and Vital Records List (July 1998). Microfiche. Digital version at https://www.familysearch.org/learn/wiki/en/images/d/d8/Igimissourij.pdf.