Sinai

County:: Brookings County
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.

Demographics

The racial composition of Sinai includes 91.82% White, and smaller percentages for other race, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	202	91.82%
Two or more races	14	6.36%
Other race	4	1.82%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Sinai Marital Status

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