ZIP Code Tabulation Area · Colorado

ZIP Code 81123: Costilla County, CO

ZIP Code 81123 (Costilla County, Colorado) has an estimated 606 residents in 323 households. The median household income is $36,487, the median home value is $152,400 and the median gross rent is $1,106/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Some estimates have a large margin of error. 3 figures for this ZIP (home value, owner-occupied, commute) are marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

606

Margin of error ±151

Median household income

$36,487

Margin of error ±$4,541

Median home value

$152,400*

Margin of error ±$76,436· estimate has a large margin of error

Median gross rent

$1,106/mo

Margin of error ±$303

Median age

46.3 yrs

Margin of error ±12.2 yrs

Mean travel time to work

23.3 min*

Margin of error ±16.3 min· estimate has a large margin of error

How ZIP 81123 compares with Colorado and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 8112346.3 yrsColorado37.7 yrsUnited States38.9 yrs

Median household income

ZIP 81123$36,487Colorado$95,470United States$80,734

Per capita income

ZIP 81123$23,721Colorado$52,636United States$44,673

Poverty rate

ZIP 8112323.6%Colorado9.4%United States12.5%

Unemployment rate

ZIP 811233.7%Colorado4.6%United States5.2%

Bachelor's degree or higher

ZIP 8112318.8%Colorado45.7%United States35.7%

Median home value

ZIP 81123$152,400*Colorado$539,400United States$332,700

Median gross rent

ZIP 81123$1,106/moColorado$1,761/moUnited States$1,413/mo

Owner-occupied homes

ZIP 8112381.7%*Colorado66.2%United States65.2%

Mean travel time to work

ZIP 8112323.3 min*Colorado25.2 minUnited States26.4 min

Worked from home

ZIP 811238.1%Colorado21.0%United States15.1%

All figures for ZIP 81123

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 81123 — ACS 2020–2024 5-year estimates
Measure	ZIP 81123	Margin of error	Colorado	United States
Total population	606	±151	5,862,189	334,922,499
Median age	46.3 yrs	±12.2 yrs	37.7 yrs	38.9 yrs
Households	323	±77	2,374,218	129,227,496
Median household income	$36,487	±$4,541	$95,470	$80,734
Per capita income	$23,721	±$5,146	$52,636	$44,673
Poverty rate	23.6%	±8.8 pts	9.4%	12.5%
Unemployment rate	3.7%	±5.4 pts	4.6%	5.2%
Bachelor's degree or higher	18.8%	±8.3 pts	45.7%	35.7%
Median home value	$152,400*	±$76,436	$539,400	$332,700
Median gross rent	$1,106/mo	±$303	$1,761/mo	$1,413/mo
Owner-occupied homes	81.7%*	±27.1 pts	66.2%	65.2%
Mean travel time to work	23.3 min*	±16.3 min	25.2 min	26.4 min
Worked from home	8.1%	±8.5 pts	21.0%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 81123
Group	ZIP 81123	Colorado	United States
White alone, not Hispanic or Latino	47.7%	64.8%	57.4%
Black or African American alone, not Hispanic or Latino	2.8%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.5%	0.4%	0.5%
Asian alone, not Hispanic or Latino	5.3%	3.2%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.1%	0.2%
Some other race alone, not Hispanic or Latino	0.0%	0.5%	0.6%
Two or more races, not Hispanic or Latino	3.5%	4.6%	4.3%
Hispanic or Latino (of any race)	40.3%	22.5%	19.3%

Where ZIP 81123 is

State: Colorado
Main county: Costilla County
Largest overlapping place: Blanca (1% of the ZIP's land area)
Land area: 145.65 sq mi· about 4 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Costilla County

81126 Costilla County, CO 81133 Costilla County, CO 81151 Costilla County, CO 81152 Costilla County, CO

See every ZIP code in Colorado, or compare ZIP 81123 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.