North Carolina · FIPS 37179 · County seat: Monroe
Union County, NC GIS & Parcel Viewer
Here is the direct link to the county parcel map covering Union County, NC: the Union County parcel map. Below you'll find basic facts about the county, steps for using the viewer, and nearby counties.
Open the Union County parcel map ↗
Opens atlas.unioncountync.gov in a new tab. We link out and never embed or copy parcel data.
Union County at a glance
| Official map | Union County parcel map |
|---|---|
| Type | County-run map |
| Website | atlas.unioncountync.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Monroe |
| Population | 256,452 (2023 Census Bureau estimate) |
| Land area | 633 sq mi |
| FIPS code | 37179 |
About the official source
It is a county-level map: Union County or the company it hires keeps the parcel layer up to date. When we tested the link in October 2026 it opened with no login and no fee.
How to use the Union 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.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
Union County by the numbers
Union County had an estimated 256,452 residents in 2023, according to the Census Bureau. With about 633 square miles of land, that works out to roughly 405 people per square mile. That makes it number 8 out of 100 North Carolina counties by population. Monroe serves as the county seat.
Counties next to Union County
Union County shares a border with the counties below. Each link has its own official map:
- Anson County
- Cabarrus County
- Mecklenburg County
- Stanly County
- Chesterfield County, SC
- Lancaster County, SC
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.