What is the population of Keystone town?

Keystone town has 404 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #176 of 485 in South Dakota.

What is the median household income in Keystone town?

Median household income in Keystone town is $62,159 a year, 20.9% below the national figure of $78,538.

How much does it cost to rent or buy in Keystone town?

Median gross rent is $690 a month and the median home value is $188,800, so rent absorbs about 13.3% of median household income.

Is Keystone town affordable compared with the rest of the US?

Homes cost about 3× the local median income here versus roughly 3.9× nationally, so Keystone town is more affordable to buy in than the typical US market, and rent takes 13.3% of median income against the 30% cost-burden line.

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South Dakota · Census place 33820

Keystone, SD population, income and ZIP codes

Quick answer

The population of the city of Keystone, South Dakota (Keystone, SD — Census place “Keystone town”) is 404 residents, ranking #176 of 485 places in South Dakota. Median household income is $62,159, the median home is worth $188,800 and median gross rent runs $690 a month. Looking for the Keystone South Dakota ZIP code list? 1 ZIP codes serve Keystone, SD: 57751.

Population: 404Keystone town residents
Median household income: $62,159Past 12 months, inflation adjusted
Median home value: $188,800Owner-occupied units
Median gross rent: $690Rent plus utilities, monthly
Median age: 37 yrsAll residents
Homeownership rate: 67.4%Owner-occupied households

Keystone ZIP codes (South Dakota)

Census ZCTAs whose delivery area overlaps Keystone.

The Keystone SD ZIP code list below covers 1 ZIP code. Open any one for its population, income, housing and rent profile.

57751

What the numbers mean in Keystone town

Housing cost measured against local earnings.

A household earning the Keystone town median would spend about 13.3% of gross income on the median rent. The 30% mark is the federal threshold for cost burden, so anything above it signals a stretched rental market. The median home costs 3.0× the median household income; nationally that ratio sits near 4.5×. Poverty affects 11.1% of residents and 67.4% of households own their home.

Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year

Keystone town, SD in context

How this area compares with national benchmarks.

Keystone town is a very small community in South Dakota, with 404 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #176 of 485 ranked by population — larger than 63% of them. The median age here is 37 years against 39.1 nationally, a slightly younger profile than the country as a whole. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in Keystone town earn a median of $62,159 a year, 20.9% below the national figure of $78,538 and 5% below the $65,500 median for the 79 South Dakota cities we cover. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 11.1% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Keystone town is valued at $188,800, 37.8% below the national figure and within a couple of points of the $192,800 peer median, while median gross rent runs $690 a month, 50.9% below the national figure, or roughly $8,280 across a full year. A household on the local median income would put about 13.3% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 3×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 67.4% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

With 404 residents, a handful of survey responses moves every median on this page. Compare Keystone town against its county rather than against national figures.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

Compare with nearby places

Places of similar size in South Dakota.

More South Dakota coverage.

Frequently asked questions

Common questions about this area.

What is the population of Keystone town?: Keystone town has 404 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #176 of 485 in South Dakota.
What is the median household income in Keystone town?: Median household income in Keystone town is $62,159 a year, 20.9% below the national figure of $78,538.
How much does it cost to rent or buy in Keystone town?: Median gross rent is $690 a month and the median home value is $188,800, so rent absorbs about 13.3% of median household income.
Is Keystone town affordable compared with the rest of the US?: Homes cost about 3× the local median income here versus roughly 3.9× nationally, so Keystone town is more affordable to buy in than the typical US market, and rent takes 13.3% of median income against the 30% cost-burden line.
How current is this Keystone town data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.