Sinai, SD Profile: Facts & Data


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Sinai, South Dakota - Basic Facts

The Town of Sinai had a population of 131 as of July 1, 2018.

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.

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  1. Sinai 2018 Demographic Data
  2. Growth Rates for Sinai (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. South Dakota Research Tools (Easy Tools & Current Data)
  3. South Dakota Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Sinai, SD Data & Demographics (As of July 1, 2018)


Total Population 131
Population in Households 131
Population in Familes 114
Population in Group Qrtrs 0
Population Density2 356
Diversity Index3 10


Median Household Income $75,000
Average Household Income $90,139
Per Capita Income $36,254


Total Housing Units 67 (100%)
Owner Occupied HU 52 (77.6%)
Renter Occupied HU 5 ( 7.5%)
Vacant Housing Units 10 (14.9%)
Median Home Value $188,636
Average Home Value $239,423


Total Households 57
Average Household Size 2.3
Family Households 43
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population 1.07% 1.19%
Households 1.12% 1.03%
Families 3.65% 1.36%
Median Household Income   1.42%
Per Capita Income   3.21%

Sinai, SD - Peer Comparisons by Rank and Percentile

The table below compares Sinai to the other 391 incorporated cities, towns and CDPs in South Dakota by rank and percentile using July 1, 2018 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 # 263 33rd
Population Density # 223 43rd
Diversity Index # 264 32nd
Median Household Income # 22 94th
Per Capita Income # 33 92nd

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

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