Ohio · FIPS 39099 · County seat: Youngstown
Mahoning County, OH GIS & Parcel Viewer
Mahoning County, Ohio parcel data lives on the Mahoning County parcel map. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Mahoning County parcel map ↗
Opens gisapp.mahoningcountyoh.gov in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Mahoning County parcel map |
|---|---|
| Type | County-run map |
| Website | gisapp.mahoningcountyoh.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Youngstown |
| Population | 225,596 (2023 Census Bureau estimate) |
| Land area | 411 sq mi |
| FIPS code | 39099 |
Who runs this map
It is a county-level map: Mahoning County or the company it hires keeps the parcel layer up to date. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this map
- 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.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
About Mahoning County
Census Bureau figures put Mahoning County at about 225,596 people (2023 estimate) on roughly 411 square miles of land, which is about 549 residents per square mile. By population it ranks 13th of 88 counties in Ohio. Youngstown serves as the county seat.
Nearby parcel maps
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Mahoning County:
- Columbiana County
- Portage County
- Stark County
- Trumbull County
- Lawrence County, PA
- Mercer County, PA (state list)
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.