Ohio · FIPS 39039 · County seat: Defiance
Defiance County, OH GIS & Parcel Viewer
Use this page to reach the official county parcel map for Defiance County, Ohio. The button below opens the Defiance County parcel map in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Defiance County parcel map ↗
Opens auditor.defiance-county.com in a new tab. We link out and never embed or copy parcel data.
Defiance County at a glance
| Official map | Defiance County parcel map |
|---|---|
| Type | County-run map |
| Website | auditor.defiance-county.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Defiance |
| Population | 38,315 (2023 Census Bureau estimate) |
| Land area | 411 sq mi |
| FIPS code | 39039 |
Who runs this map
Defiance County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. When we tested the link in October 2026 it opened with no login and no fee.
How to use the Defiance County viewer
- Open the official link in a new tab.
- Accept any disclaimer, then look for a search box that takes street addresses, owners or parcel IDs.
- Zoom in and click a parcel to see its details.
- Use the map's layer controls to add aerials or other layers if they're offered.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
About Defiance County
Defiance County had an estimated 38,315 residents in 2023, according to the Census Bureau. With about 411 square miles of land, that works out to roughly 93 people per square mile. Among Ohio's 88 counties, it is the 64th largest by population. Its county seat is Defiance.
Nearby parcel maps
Defiance County shares a border with the counties below. Each link has its own official map:
Maps vs. surveys
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.