Below are a list of the cities located in Union County, SD. There are 5 total unique zip codes in Union County, South Dakota. The time zone for Union County is the Central Daylight Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for echo $county.' County, '.$state_abbrev ?> is 46127.
The population in Union County, SD is currently 16,872. That is an increase of 14.29% vs the population of 14,399 in 2010.