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CITY · 1990 CENSUS

Sinai

South Dakota · 117 residents · 0.37 sq mi
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The short version

Sinai is a city of 117 people in South Dakota. At a median age of 41.8, this is an older place than the country as a whole. Median home value sits at $14,999. 80% of homes are owner-occupied. 7% of adults hold a bachelor's degree, below the 20% national rate. Renters pay $163 a month at the median.

At a glance
Lower income
below the US median
US median: $30,130
Older
median age 41.8
US median: 33.0
Less educated
7% hold a bachelor's degree
US average: 20%
More affordable
home values down 38%, inflation adjusted
US median home: $93,722
Section 01

Population & growth

Total population
117
−12%vs 2000
vs 133 in 2000
1990 – 2025
Median age
41.8
+17%vs 2000
vs 35.6 in 2000
US average: 33.0
Land area
0.37 sq mi
Population, 1990 – 2024
7511415419423319902000201020202024Sinai
2024215
1990201020202024
Age distribution, 1990
Under 53.4%(4)
US avg: 7.3%
5 to 98.5%(10)
US avg: 7.3%
10 to 147.7%(9)
US avg: 6.9%
15 to 198.5%(10)
US avg: 7.1%
20 to 241.7%(2)
US avg: 7.5%
25 to 3411.1%(13)
US avg: 17.5%
35 to 4414.5%(17)
US avg: 15.1%
45 to 5412.8%(15)
US avg: 10.2%
55 to 643.4%(4)
US avg: 8.5%
65 to 7414.5%(17)
US avg: 7.3%
75 to 847.7%(9)
US avg: 4%
85 and over6%(7)
US avg: 1.2%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$21,667
−25%inflation adjusted, since 2000
vs $38,000 in 2000
US average: $30,130
1990 – 2024
Per capita income
$9,847
−44%vs 2000
vs $17,451 in 2000
US average: $14,340
Poverty rate
2.6%
−3.2 ptsvs 2000
vs 5.7% in 2000
US average: 13.2%
Section 03

Housing

Median home value
$14,999
−38%inflation adjusted, since 2000
vs $32,100 in 2000
US average: $93,722
1990 – 2024
Median gross rent
$163
−39%inflation adjusted, since 2000
vs $350 in 2000
US average: $450
Owner-occupied
80.0%
+0.4 ptsvs 2000
vs 79.6% in 2000
20.0% rent
Section 04

Race & ethnicity

2000
White, non-Hispanic100%(133)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other0%
1990
White, non-Hispanic100%(117)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other0%(0)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Mexican9.3%(20)
Honduran2.3%(5)
Ancestry
German35.3%(76)
Danish10.7%(23)
Irish9.3%(20)
Norwegian7.4%(16)
Czech5.6%(12)
Hungarian2.8%(6)
Swedish2.3%(5)
British1.4%(3)
Dutch1.4%(3)
Belgian0.9%(2)
Section 05

Education

Bachelor's degree or higher
7.3%
−2.3 ptsvs 2000
vs 9.6% in 2000
US average: 20.3%
High school or higher
80.5%
−3.6 ptsvs 2000
vs 84.0% in 2000
US average: 75.2%
Graduate degree
4.9%
+2.8 ptsvs 2000
vs 2.1% in 2000
US average: 7.1%
Section 06

Commute & transportation

Average commute
18.9 min
+48%vs 2000
vs 12.8 min in 2000
US average: 21.9
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status (2024)
Men 15+
Never married31.1%(23)
Married60.8%(45)
Widowed2.7%(2)
Divorced5.4%(4)
Women 15+
Never married12%(6)
Married82%(41)
Widowed4%(2)
Divorced2%(1)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured
14.0%
−8.1 ptssince 2013
from 22.1% in 2013
US average: 8.4%
Employer-based
67.4%
−9.7 ptssince 2020
from 77.1% in 2020
US average: 54.8%
Direct-purchase
2.8%
−0.8 ptssince 2020
from 3.6% in 2020
US average: 13.8%
Medicare
4.7%
−6.1 ptssince 2020
from 10.8% in 2020
US average: 18.4%
Medicaid
14.4%
+13.2 ptssince 2020
from 1.2% in 2020
US average: 20.9%
VA health care
0.9%
+0.3 ptssince 2020
from 0.6% in 2020
US average: 2.2%
Any private
69.8%
−13.3 ptssince 2020
from 83.1% in 2020
US average: 67.1%
Any public
18.6%
+6.6 ptssince 2020
from 12.0% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)50%(2)
US avg: 26.4%
Gulf War (1990s)0%(0)
US avg: 24.3%
Vietnam era0%(0)
US avg: 33.1%
Korean War0%(0)
US avg: 4.5%
World War II0%(0)
US avg: 1%

Share of the 4 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

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Compare Sinai to nearby cities

SINAI VS
Brookings
Income$63,493+193%
Home value$265,500+1670%
Population25,355+24758%
SEE FULL COMPARISON →
SINAI VS
Watertown
Income$69,600+221%
Home value$229,400+1429%
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SINAI VS
Brandon
Income$110,806+411%
Home value$336,600+2144%
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SINAI VS
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Home value$292,400+1849%
Population213,748+209457%
SEE FULL COMPARISON →
Frequently asked

How many people live in Sinai, South Dakota?

Sinai, South Dakota has about 117 residents according to the 1990 Census.

What is the median household income in Sinai, South Dakota?

The typical household in Sinai, South Dakota earns about $21,667 a year. Half of households make more than that, and half make less.

Is Sinai, South Dakota expensive?

In Sinai, South Dakota, the median home is worth about $14,999, and the typical rent is about $163 a month.

How educated are people in Sinai, South Dakota?

About 7.3% of adults age 25 and over in Sinai, South Dakota hold a bachelor's degree or higher.

What is the poverty rate in Sinai, South Dakota?

About 2.6% of people in Sinai, South Dakota live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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