Welcome to the NEW Miami County Auditor Website

Thank you for visiting our website! This site was designed to provide you with relevant, useful information on the operations of the Auditor's office. Our goal is to provide information and services as efficiently and accurately as possible, in ways that are relatable and accessible. I welcome any feedback you can provide for its improvement to serve you better!


Matthew W. Gearhardt  Miami County Auditor

Contact Us

Auditor, Matthew W. Gearhardt

Miami County
Auditor's Office
(937) 440-5925
(937) 440-5920
 M-F 8:00am - 4:00pm

Dog Licenses
Miami County Facts
  • Founded March 1, 1807
  • Named for Miami People
  • Seat: Troy
  • Largest City: Troy
  • Parcel Count: 53,598
  • Area
    • Total: 410.1 sq mi
    • Land: 407 sq mi
    • Water: 3.1 sq mi
  • Population (2020)
    • Total: 108,774
    • Density: 130/sq mi