Ohio · FIPS 39147 · County seat: Tiffin
Seneca County, OH GIS & Parcel Viewer
Seneca County, Ohio parcel data lives on Seneca County, Ohio Auditor Real Estate Map. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Seneca County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Seneca County at a glance
| Official map | Seneca County, Ohio Auditor Real Estate Map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Tiffin |
| Population | 54,527 (2023 Census Bureau estimate) |
| Land area | 551 sq mi |
| FIPS code | 39147 |
Who runs this map
This map is published by or for Seneca County itself, so it reflects the local parcel layer rather than a third-party copy. As of our October 2026 test, anyone could open it without signing in or paying.
How to use the Seneca 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.
Seneca County by the numbers
Census Bureau figures put Seneca County at about 54,527 people (2023 estimate) on roughly 551 square miles of land, which is about 99 residents per square mile. Among Ohio's 88 counties, it is the 47th largest by population. Tiffin serves as the county seat.
Counties next to Seneca County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Seneca County:
Before you rely on the lines
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.