Lake County ZIP Codes
South Dakota, United States · 7 codes
Lake County in South Dakota has 7 ZIP codes, from 57016 to 57076, serving 7 places.
ZIP codes in Lake
Frequently asked questions
What is the ZIP code of Lake?
Lake has 7 ZIP codes, from 57016 to 57076. The table lists the places each one serves.
How many places are listed in Lake County?
7 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.