Ohio · FIPS 39041 · County seat: Delaware
Delaware County, OH GIS & Parcel Viewer
Parcel lookups for Delaware County start at Delaware County, Ohio Auditor. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Delaware County parcel map ↗
Opens auditor.delco-gis.org in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Delaware County, Ohio Auditor |
|---|---|
| Type | County-run map |
| Website | auditor.delco-gis.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Delaware |
| Population | 231,636 (2023 Census Bureau estimate) |
| Land area | 443 sq mi |
| FIPS code | 39041 |
Who runs this map
It is a county-level map: Delaware County or the company it hires keeps the parcel layer up to date. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
The county in brief
Census Bureau figures put Delaware County at about 231,636 people (2023 estimate) on roughly 443 square miles of land, which is about 523 residents per square mile. That makes it number 12 out of 88 Ohio counties by population. Delaware serves as the county seat.
Counties next to Delaware County
Delaware County shares a border with the counties below. Each link has its own official map:
- Franklin County
- Knox County (state list)
- Licking County
- Marion County
- Morrow County
- Union County (state list)
More on Delaware County parcel maps
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.