What city is ZIP code 81638?

81638 is a Hamilton, Colorado ZIP code.

What county is 81638 in?

ZIP code 81638 is in Moffat County, Colorado.

What time zone is ZIP code 81638 in?

81638 is in the Mountain Time zone (America/Denver).

What area code is 81638?

Phone numbers in ZIP code 81638 use area code 970.

What is the population of ZIP code 81638?

About 69 people live in ZIP code 81638, according to the Census Bureau’s American Community Survey (2020–2024).

What ZIP codes are near 81638?

The nearest ZIP codes to 81638 are 81626 (Craig, 13.3 miles), 81625 (Craig, 13.7 miles), 81639 (Hayden, 20.8 miles) and 81641 (Meeker, 25.6 miles).

ZIP code 81638

Where is ZIP code 81638?

Hamilton, Colorado

Moffat County · Standard ZIP code

ZIP code 81638 belongs to Hamilton, Colorado in Moffat County. 81638 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Mountain Time zone and uses area code 970. About 69 people live in the 81638 area. The closest ZIP codes are 81626 (Craig, 13.3 mi north), 81625 (Craig, 13.7 mi north) and 81639 (Hayden, 20.8 mi northeast).

ZIP code	81638
Type	Standard ZIP code for street addresses and PO Boxes
Status	Active
City	Hamilton
State	Colorado (CO)
County	Moffat County
Time zone	Mountain Time · now
Area code	970
Coordinates	40.325, -107.5841 map
3-digit prefix	816

Population and income in 81638

Population	69 · lower than 96% of Colorado ZIP codes
People per square mile	0 · lower than 98% of Colorado ZIP codes
Median age	72.7 years · higher than 100% of Colorado ZIP codes
Men / women	55% / 45%
Income per person	$35,064
Below the poverty line	33%
Bachelor’s degree or higher	49% of adults 25+
Housing units	113
Households	41 (1.68 people on average)
Owners / renters	83% / 17%
Land area	418.12 sq mi (plus 0.12 sq mi of water)

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 81638. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.

ZIP codes near 81638

ZIP code	City	Distance	Type
81626	Craig, CO	13.3 mi N	PO Box only
81625	Craig, CO	13.7 mi N	Standard
81639	Hayden, CO	20.8 mi NE	Standard
81641	Meeker, CO	25.6 mi SW	Standard
80469	Phippsburg, CO	33.5 mi E	PO Box only
80467	Oak Creek, CO	34.8 mi E	Standard
80483	Yampa, CO	37.9 mi E	PO Box only
80487	Steamboat Springs, CO	40.3 mi NE	Standard
80477	Steamboat Springs, CO	41.1 mi E	PO Box only
81633	Dinosaur, CO	43.1 mi W	Standard
80488	Steamboat Springs, CO	43.1 mi NE	PO Box only
80428	Clark, CO	44.5 mi NE	Standard

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 81638 or measure the distance to another ZIP code.

How to address mail to 81638

JANE SMITH
123 MAIN ST
HAMILTON CO 81638

Put the city, the two-letter state code and the ZIP code on the last line. Avoid Pagoda: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (81638-XXXX) helps mail sort faster but isn’t required.

Questions

What city is ZIP code 81638?: 81638 is a Hamilton, Colorado ZIP code.
What county is 81638 in?: ZIP code 81638 is in Moffat County, Colorado.
What time zone is ZIP code 81638 in?: 81638 is in the Mountain Time zone (America/Denver).
What area code is 81638?: Phone numbers in ZIP code 81638 use area code 970.
What is the population of ZIP code 81638?: About 69 people live in ZIP code 81638, according to the Census Bureau’s American Community Survey (2020–2024).
What ZIP codes are near 81638?: The nearest ZIP codes to 81638 are 81626 (Craig, 13.3 miles), 81625 (Craig, 13.7 miles), 81639 (Hayden, 20.8 miles) and 81641 (Meeker, 25.6 miles).