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County ZIP codes · New Mexico · FIPS 35059

Union County, NM ZIP Codes

Union County, New Mexico has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Union County and 2 mainly in a neighboring county; 5 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Union County?

88410 · Amistad: $36k88414 · Capulin: –88415 · Clayton: $45k88418 · Des Moines: $78k88419 · Folsom: $96k88422 · Gladstone: $61k88424 · Grenville: –88430 · Nara Visa: $32k88436 · Sedan: –884158842488418884108841988430884228843688410 · Amistad: $36k88414 · Capulin: –88415 · Clayton: $45k88418 · Des Moines: $78k88419 · Folsom: $96k88422 · Gladstone: $61k88424 · Grenville: –88430 · Nara Visa: $32k88436 · Sedan: –884158842488418884108841988430884228843688410 · Amistad: $36k88414 · Capulin: –88415 · Clayton: $45k88418 · Des Moines: $78k88419 · Folsom: $96k88422 · Gladstone: $61k88424 · Grenville: –88430 · Nara Visa: $32k88436 · Sedan: –8841588424884188841088419884308842288436
The residential ZIP codes of Union County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 9 residential ZIP codes in Union County

7 ZIP codes lie mainly in Union County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Union County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
88415 Clayton 3,178 2 $45k $121k 84%
88418 Des Moines 536 1 $78k $165k 100%
88422 Gladstone 117 1 $61k $116k 64%
88424 Grenville 89 0 – – 100%
88419 Folsom 61 0 $96k $252k 100%
88410 Amistad 45 0 $36k – 61%
88436 Sedan 25 0 – – 100%

Partly in Union County

Residential ZIP codes mainly in another county that reach at least 1% into Union County, by their share here
In this county
88414 Capulin 137 8 – – 33%
88430 Nara Visa 250 1 $32k $84k 25%

Download the 9 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

5 ZIP codes of Union County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Union County and in the neighboring counties
ZIPIn UnionElsewhere
8841584%Harding County16%
8843025%Quay County72%; Oldham County3%
8841433%Colfax County67%
8842264%Colfax County36%
8841061%Harding County39%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Union County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Union County starts with 884.

Three-digit prefixes of Union County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Union County's
PrefixSectional centerHereAll codes
884Albuquerque, NM (SCF 870)921

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.