Sierra County, NM ZIP codes
There are 10 ZIP codes in Sierra County, NM, in 10 towns, from 87654 to 88042. The largest are 87901 (Truth Or Consequences), 87942 (Williamsburg) and 87930 (Arrey).
The county seat is Truth or Consequences.
- ZIP codes
- 10
- Towns
- 10
- County seat
- Truth or Consequences
- County FIPS
35051- State
- New Mexico
- Population
- 11,500
- Median household income
- $41,600
- Land area
- 4,181 sq mi
Sierra County ZIP codes by town
- Truth Or Consequences (county seat)
- 87901
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Sierra County ZIP codes
The ZIP codes of Sierra County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Sierra County in numbers
About 11,500 people live in Sierra County, in 5,440 households, the 25th most populous of New Mexico's 33 counties. The median household income is $41,600 a year, 35% below the New Mexico median of $64,059 (US: $80,734). The median owner-occupied home is valued at $152,600 (38% below the New Mexico median), and median gross rent is $729 a month. The median age is 57.6; 17.0% of adults 25 and over hold a bachelor's degree or higher (31.0% across New Mexico); the average commute takes 15 minutes.
| Population | 11,500 |
|---|---|
| Households | 5,440 |
| Median age | 57.6 |
| Median household income | $41,600 |
| Median home value | $152,600 |
| Median gross rent | $729 |
| Bachelor's degree or higher | 17.0% |
| Mean commute | 14.8 min |
| Population density | 3 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Sierra County
| Town | ZIP codes | Population |
|---|---|---|
| Truth Or Consequences | 1 | 6,019 |
| Elephant Butte | 1 | 1,790 |
| Arrey | 1 | 491 |
| Williamsburg | 1 | 466 |
| Caballo | 1 | 233 |
| Monticello | 1 | 206 |
| Winston | 1 | 191 |
| Hillsboro | 1 | 150 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Sierra County.
Not sure you are in Sierra County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Sierra County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
87654 | Spaceport City , NM | No street area | — | — | — |
87901 | Truth Or Consequences , NM | Standard | 6,378 | $34,242 | $128,700 |
87930 | Arrey , NM | Standard | 718 | $38,085 | — |
87931 | Caballo , NM | Standard | 703 | — | — |
87933 | Derry , NM | Standard | 0 | — | — |
87935 | Elephant Butte , NM | Standard | 2,094 | $51,033 | $197,700 |
87939 | Monticello , NM | Standard | 206 | — | — |
87942 | Williamsburg , NM | Standard | 1,005 | $42,308 | $114,800 |
87943 | Winston , NM | Standard | 191 | — | — |
88042 | Hillsboro , NM | Standard | 205 | $75,137 | $195,900 |
Cite this page
zipcodes.pro. “Sierra County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/nm/county/sierra
Underlying data is public domain or openly licensed — sources, vintages and licences.