Ohio · FIPS 39109 · County seat: Troy
Miami County, OH GIS & Parcel Viewer
Parcel lookups for Miami County start at the Miami County ArcGIS parcel map. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Miami County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Miami County at a glance
| Official map | Miami County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Troy |
| Population | 110,876 (2023 Census Bureau estimate) |
| Land area | 407 sq mi |
| FIPS code | 39109 |
Where the parcel data comes from
This map is published by or for Miami County itself, so it reflects the local parcel layer rather than a third-party copy. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Miami County viewer
- Press the button above; an ArcGIS Experience Builder app opens in a new tab. Accept any splash or disclaimer screen.
- Search by address or parcel ID, or pan to the area.
- Select a parcel to view the information the publisher makes available.
- Explore the app's panels for layers, legends or printing.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
The county in brief
Miami County had an estimated 110,876 residents in 2023, according to the Census Bureau. With about 407 square miles of land, that works out to roughly 272 people per square mile. That makes it number 25 out of 88 Ohio counties by population. The county seat is Troy.
Nearby parcel maps
Miami County shares a border with the counties below. Each link has its own official map:
A note on accuracy
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.