Costilla County, CO ZIP Codes
6 ZIP codes cover all or part of Costilla County, Colorado: 81151, 81152, 81133, 81123, 81126 and 81138. The Census Bureau counts 3,607 residents in the county, with a median household income of $36,861 and a median home value of $184,700. Median household income ranges from $31,875 in 81152 to $45,833 in 81133. Its largest communities include Sanford, San Luis, Fort Garland, Blanca and San Acacio.
Costilla County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 3,607 |
| Households | 1,651 |
| Median household income | $36,861 |
| Median home value | $184,700 |
| Median age | 50.5 |
| Median rent | $927 |
All 6 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 5,174 |
| Households (sum of ZIP codes) | 2,315 |
| Median household income, range across ZIP codes | $31,875 (81152) to $45,833 (81133) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $40,624 |
| Homeowners | 77.8% |
| Households with kids under 18 | 28.7% |
| Moved in the past year | 10.8% |
| Carrier routes in EDDM2GO's route library | 2 routes, 328 homes (1 of 6 ZIP codes) |
Top facts
- Highest median household income in Costilla County: 81133 ($45,833)
- Most residents: 81151 (1,716 people)
- Highest homeownership: 81133 (85.3% own their home)
- Most households with kids: 81151 (34.2% of households)
- Most new movers: 81133 (12.1% moved in last year)
- Youngest median age: 81151 (40.6 years)
- Highest median home value: 81133 ($273,400)
Every ZIP code in Costilla County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 81151 | Sanford | 1,716 | 767 | $43,417 | $188,500 | 76.3% | 34.2% | 10.5% | — | — | 57% of its land |
| 81152 | San Luis | 1,244 | 552 | $31,875 | $120,300 | 68.1% | 26.3% | 6.9% | 2 | 329 | 100% of its land |
| 81133 | Fort Garland | 1,085 | 516 | $45,833 | $273,400 | 85.3% | 25.6% | 12.1% | — | — | 100% of its land |
| 81123 | Blanca | 606 | 323 | $36,487 | $152,400 | 81.7% | 23.8% | 7.8% | — | — | 100% of its land |
| 81126 | Costilla County | 506 | 140 | $52,870 | $170,400 | 85.0% | 33.6% | 22.5% | — | — | 100% of its land |
| 81138 | Costilla County | 17 | 17 | — | — | 100.0% | 0.0% | 0.0% | — | — | 100% of its land |
A ZIP code is listed for Costilla County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Sanford — 1,142 residents · 1 ZIP code
- San Luis — 560 residents · 1 ZIP code
- Fort Garland — 446 residents · 1 ZIP code
- Blanca — 230 residents · 1 ZIP code
- San Acacio — 61 residents · 1 ZIP code
Price a mailing to Costilla County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Costilla County, CO?
- 81151, 81152, 81133, 81123, 81126 and 81138. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Costilla County?
- 3,607 residents in 1,651 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Costilla County?
- $36,861 for the county as a whole. Its ZIP codes range from $31,875 (81152) to $45,833 (81133).
- Which Costilla County ZIP code has the highest median household income?
- 81133, at $45,833, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Costilla County?
- For the 1 of 6 ZIP codes in EDDM2GO's stored route library: 2 carrier routes reaching 328 residential and 1 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.