Keystone, South Dakota Population 2020

339

Keystone is a city located in South Dakota. With a 2020 population of 339, it is the 149th largest city in South Dakota and the 14880th largest city in the United States. Keystone is currently declining at a rate of -0.29% annually but its population has increased by 0.59% since the most recent census, which recorded a population of 337 in 2010. Keystone reached it's highest population of 341 in 2013. Spanning over 3 miles, Keystone has a population density of 119 people per square mile.

The average household income in Keystone is $57,175 with a poverty rate of 19.09%. The median rental costs in recent years comes to $442 per month, and the median house value is $124,100. The median age in Keystone is 32.4 years, 25.8 years for males, and 39.2 years for females. For every 100 females there are 118.6 males.

Keystone Demographics

According to the most recent ACS, the racial composition of Keystone was:

  • White: 82.99%
  • Other race: 8.74%
  • Two or more races: 3.22%
  • Asian: 2.99%
  • Native American: 1.84%
  • Native Hawaiian or Pacific Islander: 0.23%
  • Black or African American: 0.00%
The current population of Keystone, South Dakota is 339, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 341.The last official US Census in 2010 recorded the population at 337.

Keystone, South Dakota Population 2020

Population by Race

Race Population Percentage
White36182.99%
Some Other Race388.74%
Two or More Races143.22%
Asian132.99%
American Indian and Alaska Native81.84%
Native Hawaiian and Other Pacific Islander10.23%

Keystone Population Pyramid 2020

Keystone Median Age

32.4


Total

25.8


Male

39.2


Female

Keystone Adults

There are 332 adults, (44 of whom are seniors) in Keystone.

Keystone Age Dependency

51

Age Dependency Ratio

15.3

Old Age Dependency Ratio

35.8

Child Dependency Ratio

Keystone Sex Ratio

Female

199

45.75%

Male

236

54.25%

Keystone Households and Families

Keystone Renter vs Owner Occupied by Household Type

Keystone Household Types

Type Owner Renter
Married84.8%15.2%
Female72.2%27.8%
All55.6%44.4%
Male33.3%66.7%
Non Family16.4%83.6%

55.6%

Rate of Home Ownership

Type Count Average Size Owned
All1422.8955.6
Married663.4784.8
Non Family552.3316.4
Female182.2872.2
Male34.3333.3

3.16

Average Family Size

2.89

Average Household Size

4.9%

Unmarried (Opposite Sex)

2.1%

Unmarried (Same Sex)

Keystone Education

Education Attained Count Percentage
Less Than 9th Grade124.74%
9th to 12th Grade31.19%
High School Graduate10441.11%
Some College5019.76%
Associates Degree2811.07%
Bachelors Degree4718.58%
Graduate Degree93.56%

Keystone Educational Attainment by Race

Name Total High School Bachelors
White20519954
Hispanic3226
Other Race1711
Native American662
Multiple Races55
Asian2
Islander1

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among native american people with a rate of 33.33%.

Name Average Male Female
Overall$20,750$23,594$16,806
Less Than High School$38,542$$
High School Grad$14,583$24,286$13,015
Some College$23,750$18,125$26,607
Bachelors Degree$30,417$$45,208
Graduate Degree$$$

$20,750

Average Earnings

$23,594

Average Male

$16,806

Average Female

Keystone Language

Keystone Language by Age

Keystone Language

76.57% of Keystone residents speak only English, while 23.43% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 16.91% of the population.

Keystone Poverty

Keystone Poverty by Race

Name Total In Poverty Poverty Rate
White2914013.75%
Hispanic901415.56%
Asian131184.62%
Multiple14964.29%
Native8675.00%

19.09%

Overall Poverty Rate

23.89%

Male Poverty Rate

13.47%

Female Poverty Rate

Poverty in Keystone

The race most likely to be in poverty in Keystone is Asian, with 84.62% below the poverty level.

The race least likely to be in poverty in Keystone is White, with 13.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.03%. Among those working part-time, it was 41.33%, and for those that did not work, the poverty rate was 17.14%.

Name Poverty
Less Than High School13.33%
Some College12.82%
High School9.62%
Bachelors or Greater3.57%
Name Poverty
Male Unemployed50.00%
Male Employed27.66%
Female Employed15.84%
Female Unemployed0.00%

Keystone Income

Keystone Income by Household Type

Name Median Mean
Households$46,136$57,175
Families$49,844$69,940
Married Families$66,071-
Non Families$29,063$35,153

Keystone Marital Status

Keystone Marital Status

Marriage Rates

38.8%

Overall Marriage Rate

35.3%

Male Marriage Rate

42.7%

Female Marriage Rate

Keystone Married by Age and Sex

Keystone Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Keystone Marital Status by Race

Keystone Veterans

43

Number of Veterans

36

Male Veterans

7

Female Veterans

War Veterans
Vietnam19
First Gulf War17
Second Gulf War12
Korea1
World War II

$Keystone Veterans by Education

2.33%

Veteran Poverty Rate

9.30%

Veteran Disability Rate

Keystone Employment Status

79.3%

Labor Force Participation

72.7%

Employment Rate

8.3%

Unemployment Rate

Keystone Place of Birth

Origin of Non-Citizens

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

45.75%

Born in South Dakota

82.30%

Native Born

17.70%

Foreign Born

17.24%

Non Citizen

Place of Birth

82.30% of Keystone residents were born in the United States, with 45.75% having been born in South Dakota. 17.24% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Year Population Growth Annual Growth Rate
2020339-1-0.29%
2019340-1-0.29%
201834120.59%
2017339-1-0.29%
201634010.29%
2015339-2-0.59%
20143410.00%
201334110.29%
201234051.49%
201133510.30%
20103340.00%