Miami County, Ohio Genealogy

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Template:Ohio-stubUnited States  > Ohio > Miami County

County Courthouse


Parent County

1807--Miami County was created 16 January 1807 from Montgomery County.  County seat: Troy [1]

Boundary Changes

Record Loss


Populated Places

Neighboring Counties



Biographical Sketches and Stories of Miami County Ohio - People, places, and things.  Indexed by surname


Miami County Cemetery and Gravestone Inscriptions.  A list of burial places in Miami County for which inscriptions have been copied.



Records from the Miami County Courthouse and other locations containing Probate Court Index, Deeds Index, Marriage Index, Children's Home records, Pauper's Records, etc.


Miami Valley Genealogy Index is an Index to more than a half million pointers to records all over Miami Valley not just Miami County, Ohio.


Township Maps of the 12 townships along with census indexes and historical descriptions.

Local Histories

Histories of Miami County for 1846, 1880, 1909, 1920 and Randolph Slaves.



Military Records of Miami County.


Marriage and Birth notices from Newspapers



Early Tax and Census records 1810-1840 period.

Vital Records

Ohio Deaths, 1908-1953 Free name indexes and images at FamilySearch – Pilot. Records include such information as birth date of deceased, city, county, and state of death, name of spouse if married, names of parents, maiden name of mother, name of informant, if deceased was single, married, windowed or divorced, occupation of deceased.

Societies and Libraries 

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
  • Miami County, Ohio site has many links to court records, newspapers, histories of the county, etc.


  1. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).