Welcome from your Miami County Coordinator!

Troy City Hall 1899

Welcome! Thanks for visiting the Miami County, Ohio, USGenWeb site. This site will serve as a gathering place for all who share common lines in Miami County. Have a good time while you're here. If you have any suggestions for the site, please email Maggie Stewart-Zimmerman.

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About Miami County

  • Facts

    County Seat: Troy
    DATE CREATED: March 1, 1807
    Parent County: Montgomery County
    Square Miles: 407
    Named for: Native Amreican Tribe.



  • History

    MIAMI COUNTY was formed from Montgomery, January 16, 1807, and Staunton made the temporary seat of justice. The word Miami, in the Ottawa language, is said to signify mother. The name Miami was originally the designation of the tribe who anciently bore the name of "Tewightewee." This tribe were the original inhabitants of the Miami valley, and affirmed they were created in it. East of the Miami the surface is gently rolling, and a large proportion of it a rich alluvial soil; west of the Miami the surface is generally level, the soil a clay loam and better adapted to small grain and grass than corn. The county abounds in excellent limestone and has a large amount of water power. In agricultural resources this is one of the richest counties in the State. Moreā€¦

    Historical Collections of Ohio
    By Henry Howe
    Vol. II
    © 1888
  • Courthouse

    Shortly after the establishment of the county seat a log courthouse was built. The log courthouse was occupied until 1816, when it was superseded by one of brick, which was erected in the Public Square. This temple of justice cost $2,500 and stood until l841, when a third court house, which occupied the present site of the post office was built at an expense of $20,000.


    The present courthouse was completed in 1888. Patterned after the U.S. Capitol dome, also constructed in cast iron, this is one of five such major cast iron domes in the U.S. The courthouse serves a population of 93,182.