Sinai Flag

Sinai

County Seat:
No
Area (mi²):
0.368
State:
South Dakota

Sinai is a town located in Brookings County, South Dakota. Sinai has a 2025 population of 104. Sinai is currently growing at a rate of 1.96% annually and its population has increased by 8.33% since the most recent census, which recorded a population of 96 in 2020.

The average household income in Sinai is $68,621 with a poverty rate of 1.36%.The median age in Sinai is 24.9 years: 24.8 years for males, and 27.3 years for females.

104
Total Population
283
Density (mi²)
2 1.96%
Growth

Sinai Population

Sinai Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Sinai includes 91.82% White, and smaller percentages for other race and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White20291.82%
Two or more races146.36%
Other race41.82%

Sinai Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Sinai's average per capita income is $47,083. Household income levels show a median of $52,188. The poverty rate stands at 1.36%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$78,750-
Families$77,813$77,123
Households$52,188$68,621
Non Families$40,982$52,352

$47,083

Average Income

$52,188

Median Household Income

1.36%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)