ZIP codes

ZIP codes in Union County, North Carolina

Union County has 11 ZIP codes. 6 lie entirely inside it and 5 are shared with neighboring counties, so part of their land and their people are elsewhere. About 250,657 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 11; 1 more just touches the border (under 1% of their land)
Entirely inside: 6; 99% or more of their land
Shared with other counties: 5; Most with Mecklenburg County (3)
Most populated ZIP: 28173; 65,274 people · Waxhaw
Least populated ZIP: 28108; 34 people · Mineral Springs
Largest ZIP by land: 28103; 153 sq mi · Marshville

Map of the ZIP codes in Union County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Union County

11 ZIP codes in Union County, NC, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
28079	Fairview	43,035	100%	43,035
28103	Marshville	10,714	98%	≈ 10,649
28104	Weddington	36,641	97%	≈ 35,421
28105	Matthews	46,817	1.4%	≈ 642
28107	Midland	10,244	3.1%	≈ 225
28108	Mineral Springs	34	100%	34
28110	Unionville	56,971	100%	56,971
28112	Monroe	28,461	100%	28,461
28133	Peachland	2,060	4.3%	≈ 248
28173	Waxhaw	65,274	100%	65,274
28174	Wingate	9,573	100%	9,573

They also touch the county with under 1% of their land, so they aren’t counted: 28227.

ZIP codes shared with other counties

These 5 ZIP codes have part of their land in another county. The first figure is the share of their land in Union County; then, where the rest lies.

28103 (Marshville): 98% here; 2.5% in Anson County.
28104 (Weddington): 97% here; 3.1% in Mecklenburg County.
28105 (Matthews): 1.4% here; 99% in Mecklenburg County.
28107 (Midland): 3.1% here; 92% in Cabarrus County, 3.8% in Mecklenburg County, and 1.6% in Stanly County.
28133 (Peachland): 4.3% here; 96% in Anson County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Fairview (1), Marshville (1), Matthews (1), Midland (1), Mineral Springs (1), and Monroe (1); 11 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 280 and 281.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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