County · code 37179
Union CountyNorth Carolina
Union County is a county in North Carolina with its seat in Monroe. It was created on December 19, 1842, from Anson and Mecklenburg counties.
- Founded1842
- County seatMonroe
- Named formerger
- Land area633 sq mi + 6.9 sq mi water
- Population238,267 2020 Census
- Parcels mapped117,668 checked 16 October 2026
Where it is
Union on the map of North Carolina
North Carolina has 100 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1842 from Anson County and Mecklenburg County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Union County was created from Anson County and Mecklenburg County, and was named after the merger.
- 1842Union County created Union created from Anson and Mecklenburg. · N.C. Sess. Laws 1842-1843, pub., ch. 12, sec. 1/p. 20
Land and parcels
What the maps cover in Union
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 117,668 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 11 September 2026 · checked 16 October 2026 -
Address points Official
One point per address, 106,019 in all from NC Center for Geographic Information and Analysis (CGIA, NC Dept of Information Technology) for NC OneMap, with the North Carolina 911 Board (AddressNC program).
checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Union by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Union County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Union County.
See your own lot on these maps
Open Union County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Union County
- When was Union County founded?
- Union County was founded in 1842, formed from Anson County and Mecklenburg County, and named after merger.
- What is the county seat of Union County?
- The county seat of Union County is Monroe.
- Is there an online parcel map for Union County?
- Yes. A public source publishes a parcel map of 117,668 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Union County's boundary or name changed?
- Union County was created in 1842 from Anson County and Mecklenburg County. The Atlas of Historical County Boundaries records no boundary change since.
- Is my lot in a flood zone?
- We do not have flood maps for Union County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby