Union County SD Information


Union County Subdivisions

Union County SD Data & Demographics (As of July 1, 2017)


Total Population 15,835
Daytime Population: Workers 9,105
Daytime Population: Residents 7,679
Total Daytime Population (TDP) 16,784
Ratio TDP/Total Population1 1.06
Population in Households 15,746
Population in Familes 13,168
Population in Group Qrtrs 89
Population Density2 34
Diversity Index3 20


Median Household Income $63,561
Average Household Income $91,277
Per Capita Income $36,525


Total Housing Units 6,999 (100%)
Owner Occupied HU 4,739 (67.7%)
Renter Occupied HU 1,573 (22.5%)
Vacant Housing Units 687 ( 9.8%)
Median Home Value $178,279
Average Home Value $221,165


Total Households 6,312
Average Household Size 2.49
Family Households 4,396
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.32% 1.2%
Households 1.28% 1.18%
Families 1.16% 1.1%
Median Household Income   3.81%
Per Capita Income   3.59%


Union County SD - Peer Comparisons by Rank and Percentile

The table below compares Union County to the other 66 counties and county equivalents in South Dakota by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 13 82nd
Population Density # 8 89th
Diversity Index # 35 48th
Median Household Income # 2 98th
Per Capita Income # 1 100th

Additional comparisons and rankings can be made with a VERY EASY TO USE South Dakota Census Data Comparison Tool.