Yankton, South Dakota

1 ZIP code · Central time

ZIP codes (largest first)

57078 · 20,383
Population15,540
StateSouth Dakota
CountyYankton County
Area code605
Time zoneCentral
Land area8.74 sq mi

Find the ZIP+4 for an address in Yankton

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

Population: U.S. Census Bureau, ACS 5-year estimates, 2024.