Onamia Minnesota Area Code

One area code covers Onamia: 320.

The code covering Onamia

Area codes covering Onamia, Minnesota, with what each one primarily serves.
Area code	Primarily serves	In service
320	Willmar	1996

Scope the codes matched to Onamia. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot) and LocalCallingGuide NPA list (2026-07 NPA list). Updated 16 July 2026. Overlay relationships come from the numbering-plan authority; the place match is computed.

Which part of town has which code

Onamia has a single code, so there is nothing to divide — every local line carries 320.

ZIP codes for the same city

Postal geography is organised separately from telephone geography, so Onamia’s 1 ZIP code do not map onto the codes above. They are listed in full, with the county each falls in, on the postal side of the site.

Onamia Minnesota ZIP codes →

Nearby places with different codes

These are the closest places to Onamia whose area codes are not the same set. If you are near one of them, a local number may carry a code that is not on the list above.

The nearest places to Onamia covered by a different set of area codes.
City	Distance	Their area codes
Garrison Minnesota area codes	18 mi	218, 320
Deerwood Minnesota area codes	30 mi	218
Aitkin Minnesota area codes	32 mi	218
Crosby Minnesota area codes	32 mi	218
Brainerd Minnesota area codes	32 mi	218
Ironton Minnesota area codes	33 mi	218
Fort Ripley Minnesota area codes	34 mi	218
Baxter Minnesota area codes	35 mi	218

Straight-line distance between place reference points, not driving distance.