What city is ZIP code 81138?

81138 is a Jaroso, Colorado ZIP code.

What county is 81138 in?

ZIP code 81138 is in Costilla County, Colorado.

What time zone is ZIP code 81138 in?

81138 is in the Mountain Time zone (America/Denver).

What area code is 81138?

Phone numbers in ZIP code 81138 use area codes 575 and 719.

What is the population of ZIP code 81138?

About 17 people live in ZIP code 81138, according to the Census Bureau’s American Community Survey (2020–2024).

Can I use 81138 for a street address?

No. 81138 is only for PO Boxes. Street addresses in Jaroso use another ZIP code.

What ZIP codes are near 81138?

The nearest ZIP codes to 81138 are 87524 (Costilla, 5.5 miles), 87512 (Amalia, 10.3 miles), 81152 (San Luis, 10.8 miles) and 87519 (Cerro, 17.2 miles).

ZIP code 81138

Where is ZIP code 81138?

Jaroso, Colorado

Costilla County · PO Box only ZIP code

ZIP code 81138 belongs to Jaroso, Colorado in Costilla County. 81138 is a PO Box only ZIP code: it is used for post office boxes at the Jaroso post office, not for street addresses. It is in the Mountain Time zone and uses area codes 575 and 719. About 17 people live in the 81138 area. The closest ZIP codes are 87524 (Costilla, 5.5 mi southwest), 87512 (Amalia, 10.3 mi southeast) and 81152 (San Luis, 10.8 mi northeast).

ZIP code	81138
Type	PO Box only (no street delivery)
Status	Active
City	Jaroso
State	Colorado (CO)
County	Costilla County
Time zone	Mountain Time · now
Area codes	575, 719
Coordinates	37.0028, -105.6242 map
3-digit prefix	811

Population and income in 81138

Population	17 · lower than 99% of Colorado ZIP codes
People per square mile	1 · lower than 91% of Colorado ZIP codes
Men / women	0.0% / 100%
Income per person	$0
Below the poverty line	0.0%
Bachelor’s degree or higher	0.0% of adults 25+
Housing units	26
Households	17
Owners / renters	100% / 0.0%
Land area	20.1 sq mi

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 81138. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.

ZIP codes near 81138

ZIP code	City	Distance	Type
87524	Costilla, NM	5.5 mi SW	PO Box only
87512	Amalia, NM	10.3 mi SE	PO Box only
81152	San Luis, CO	10.8 mi NE	Standard
87519	Cerro, NM	17.2 mi S	PO Box only
81126	Chama, CO	17.5 mi NE	PO Box only
81141	Manassa, CO	20.6 mi NW	PO Box only
87556	Questa, NM	20.7 mi S	Standard
81148	Romeo, CO	23.1 mi NW	PO Box only
81129	Conejos, CO	23.2 mi W	PO Box only
81151	Sanford, CO	23.5 mi NW	Standard
81120	Antonito, CO	23.5 mi W	Standard
87558	Red River, NM	24.8 mi S	PO Box only

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 81138 or measure the distance to another ZIP code.

How to address mail to 81138

JANE SMITH
PO BOX 123
JAROSO CO 81138

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (81138-XXXX) helps mail sort faster but isn’t required.

Questions

What city is ZIP code 81138?: 81138 is a Jaroso, Colorado ZIP code.
What county is 81138 in?: ZIP code 81138 is in Costilla County, Colorado.
What time zone is ZIP code 81138 in?: 81138 is in the Mountain Time zone (America/Denver).
What area code is 81138?: Phone numbers in ZIP code 81138 use area codes 575 and 719.
What is the population of ZIP code 81138?: About 17 people live in ZIP code 81138, according to the Census Bureau’s American Community Survey (2020–2024).
Can I use 81138 for a street address?: No. 81138 is only for PO Boxes. Street addresses in Jaroso use another ZIP code.
What ZIP codes are near 81138?: The nearest ZIP codes to 81138 are 87524 (Costilla, 5.5 miles), 87512 (Amalia, 10.3 miles), 81152 (San Luis, 10.8 miles) and 87519 (Cerro, 17.2 miles).