Sully County SD Information


Sully County Subdivisions

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


Total Population 1,408
Daytime Population: Workers 766
Daytime Population: Residents 536
Total Daytime Population (TDP) 1,302
Ratio TDP/Total Population1 0.92
Population in Households 1,408
Population in Familes 1,140
Population in Group Qrtrs 0
Population Density2 1
Diversity Index3 10


Median Household Income $58,944
Average Household Income $78,006
Per Capita Income $34,903


Total Housing Units 880 (100%)
Owner Occupied HU 495 (56.2%)
Renter Occupied HU 135 (15.3%)
Vacant Housing Units 250 (28.4%)
Median Home Value $99,088
Average Home Value $157,778


Total Households 630
Average Household Size 2.23
Family Households 406
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 0.35% 0.25%
Households 0.45% 0.35%
Families 0.31% 0.25%
Median Household Income   2.99%
Per Capita Income   3.38%


Sully County SD - Peer Comparisons by Rank and Percentile

The table below compares Sully 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 # 63 6th
Population Density # 62 8th
Diversity Index # 56 17th
Median Household Income # 5 94th
Per Capita Income # 4 95th

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