ZIP Codes Box

Lake County, South Dakota ZIP codes

7ZIP codes
7Cities and towns
11,128People in ZIP areas
605Area code

Lake 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 Lake County

ZIP codeCityTypePopulationMedian income
57016ChesterStandard676$95,815
57042MadisonStandard7,756$71,868
57050NundaStandard176$116,563
57054RamonaStandard703$86,875
57057RutlandStandard196$71,500
57075WentworthStandard1,296$106,763
57076WinfredStandard325$118,281

Cities and towns in Lake County

Area codes in Lake County

Questions

How many ZIP codes are in Lake County, SD?
Lake County has 7 ZIP codes.
What cities are in Lake County?
Lake County ZIP codes cover Chester, Madison, Nunda, Ramona, Rutland, Wentworth and Winfred.
What area code is Lake County, SD?
Lake County uses area code 605.
What time zone is Lake County in?
Lake County is in Central Time.

Other South Dakota counties