What city is ZIP code 83121?

83121 is a Frontier, Wyoming ZIP code.

What county is 83121 in?

ZIP code 83121 is in Lincoln County, Wyoming.

What time zone is ZIP code 83121 in?

83121 is in the Mountain Time zone (America/Denver).

What area code is 83121?

Phone numbers in ZIP code 83121 use area code 307.

Can I use 83121 for a street address?

No. 83121 is only for PO Boxes. Street addresses in Frontier use another ZIP code.

What ZIP codes are near 83121?

The nearest ZIP codes to 83121 are 83101 (Kemmerer, 1.8 miles), 83116 (Diamondville, 2.1 miles), 83124 (Opal, 13.7 miles) and 83114 (Cokeville, 25.8 miles).

ZIP code 83121

Where is ZIP code 83121?

Frontier, Wyoming

Lincoln County · PO Box only ZIP code

ZIP code 83121 belongs to Frontier, Wyoming in Lincoln County. 83121 is a PO Box only ZIP code: it is used for post office boxes at the Frontier post office, not for street addresses. It is in the Mountain Time zone and uses area code 307. The closest ZIP codes are 83101 (Kemmerer, 1.8 mi south), 83116 (Diamondville, 2.1 mi south) and 83124 (Opal, 13.7 mi east).

ZIP code	83121
Type	PO Box only (no street delivery)
Status	Active
City	Frontier
State	Wyoming (WY)
County	Lincoln County
Time zone	Mountain Time · now
Area code	307
Coordinates	41.8141, -110.5371 map
3-digit prefix	831

The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.

ZIP codes near 83121

ZIP code	City	Distance	Type
83101	Kemmerer, WY	1.8 mi S	Standard
83116	Diamondville, WY	2.1 mi S	PO Box only
83124	Opal, WY	13.7 mi E	PO Box only
83114	Cokeville, WY	25.8 mi NW	Standard
82934	Granger, WY	33 mi SE	PO Box only
83123	La Barge, WY	34.3 mi NE	Standard
84064	Randolph, UT	35.2 mi W	PO Box only
82933	Fort Bridger, WY	35.3 mi S	Standard
82937	Lyman, WY	35.8 mi S	Standard
84038	Laketown, UT	37.7 mi W	PO Box only
82929	Little America, WY	39.7 mi SE	PO Box only
84086	Woodruff, UT	40.4 mi SW	Standard

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 83121 or measure the distance to another ZIP code.

How to address mail to 83121

JANE SMITH
PO BOX 123
FRONTIER WY 83121

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (83121-XXXX) helps mail sort faster but isn’t required.

Questions

What city is ZIP code 83121?: 83121 is a Frontier, Wyoming ZIP code.
What county is 83121 in?: ZIP code 83121 is in Lincoln County, Wyoming.
What time zone is ZIP code 83121 in?: 83121 is in the Mountain Time zone (America/Denver).
What area code is 83121?: Phone numbers in ZIP code 83121 use area code 307.
Can I use 83121 for a street address?: No. 83121 is only for PO Boxes. Street addresses in Frontier use another ZIP code.
What ZIP codes are near 83121?: The nearest ZIP codes to 83121 are 83101 (Kemmerer, 1.8 miles), 83116 (Diamondville, 2.1 miles), 83124 (Opal, 13.7 miles) and 83114 (Cokeville, 25.8 miles).