What cities are in Union County?

Union County ZIP codes cover Alcester, Beresford, Elk Point, Jefferson and North Sioux City.

What area code is Union County, SD?

Union County uses area codes 402, 531, 605 and 712.

What time zone is Union County in?

Union County is in Central Time.

Union County, South Dakota ZIP codes

5ZIP codes

5Cities and towns

18,252People in ZIP areas

402, 531, 605Area codes

Union County is in South Dakota and the Central Time zone. ZIP codes don’t follow county lines exactly, so a ZIP code listed here can reach into a neighboring county.

All ZIP codes in Union County

ZIP code	City	Type	Population	Median income
57001	Alcester	Standard	1,540	$69,531
57004	Beresford	Standard	3,834	$88,750
57025	Elk Point	Standard	3,120	$94,839
57038	Jefferson	Standard	1,796	$106,250
57049	North Sioux City	Standard	7,962	$93,134

Cities and towns in Union County

Alcester 1 ZIP
Beresford 1 ZIP
Elk Point 1 ZIP
Jefferson 1 ZIP
North Sioux City 1 ZIP

Area codes in Union County

Questions

How many ZIP codes are in Union County, SD?: Union County has 5 ZIP codes.
What cities are in Union County?: Union County ZIP codes cover Alcester, Beresford, Elk Point, Jefferson and North Sioux City.
What area code is Union County, SD?: Union County uses area codes 402, 531, 605 and 712.
What time zone is Union County in?: Union County is in Central Time.

Union County, South Dakota ZIP codes

All ZIP codes in Union County

Cities and towns in Union County

Area codes in Union County

Questions

Other South Dakota counties