Sinai, SD Profile: Facts, Map & Data


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Sinai, South Dakota - Basic Facts

The Town of Sinai had a population of 128 as of July 1, 2015.

The primary coordinate point for Sinai is located at latitude 44.2445 and longitude -97.044 in Brookings County. The formal boundaries for the Town of Sinai (see map below) encompass a land area of 0.37 sq. miles and a water area of 0 sq. miles. Brookings County is in the Central time zone (GMT -6). The elevation is 1,785 feet.

The Town of Sinai (GNIS ID: 1267565) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with Sinai population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.

Neighborhood Data

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Town of Sinai, SD Boundary Map

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Boundary Maps: Brookings County | South Dakota Counties

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Sinai, SD Data & Demographics (As of July 1, 2015)


Total Population 128
Population in Households 128
Population in Familes 112
Population in Group Qrtrs 0
Population Density1 348
Diversity Index2 9


Total Households 56
Average Household Size 2.29
Family Households 43
Average Family Size 3


Total Housing Units 66 (100%)
Owner Occupied HU 51 (77.3%)
Renter Occupied HU 5 ( 7.6%)
Vacant Housing Units 10 (15.2%)
Median Home Value $98,529
Average Home Value $181,132


Median Household Income $75,571
Average Household Income $87,617
Per Capita Income $36,710
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.24% 1.52%
Households 1.42% 1.39%
Families 5.79% 1.36%
Median Household Income   1.53%
Per Capita Income   2.25%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


Sinai, SD - Peer Comparisons by Rank and Percentile

The table below compares Sinai to the other 390 incorporated cities, towns and CDPs in South Dakota by rank and percentile using July 1, 2015 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 # 265 32nd
Population Density1 # 224 43rd
Diversity Index2 # 274 29th
Median Household Income # 9 98th
Per Capita Income # 15 96th

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