PlainZIP

Isabel, SD · standard

ZIP Code 57633

Dewey County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

414
0/sq mi
$78,750
Median income
$70,000
Median home value
20.9%
Bachelor's or higher

The verdict

Isabel pairs an above-median household income with among the most affordable home values nationally, in a rural, homeowner-dominated area.

Top 40%
household income, US ZIPs
3th pct
home value, US ZIPs
0
people per sq mi
77%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57633 against every reporting US ZIP.

ZIP code 57633 is a sparsely populated ZIP (a standard USPS delivery area) in Isabel, Dewey County, South Dakota, home to just 414 residents across 2070.0 square miles, a density of 0 people per square mile, in the Denver time zone.

ZIP 57633 lands in the middle-income range, with a median household income of $78,750 (3% above the South Dakota average), while per-capita income is $37,567. The poverty rate stands at 7.6% and the unemployment rate at 6.8%. Housing costs here run $70,000 for a typical home value (64% below the state average), with rent averaging $818 a month; 76.5% of homes are owner-occupied.

Educational attainment sits below the national norm: 20.9% of adults hold a bachelor's degree or higher, the median age is 36.5, and the average commute is -. The state and national benchmarks above give 57633's numbers context; they should not be read in isolation.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 57633, Isabel, SD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

414

Population

2070.0

Area (sq mi)

0

People / sq mi

Denver

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 57633?

36.5

Median Age

49.7%

Male

50.3%

Female

0.4%

Foreign-Born

White 74.4%
African American 0.4%
Asian 0.0%
American Indian or Alaska Native 22.7%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 2.5%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$78,750

Median Household Income

+3% vs state

$37,567

Per Capita Income

7.6%

Poverty Rate

6.8%

Unemployment Rate

How ZIP 57633 ranks nationally

Isabel, SD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$78,750 Top 40% higher than 60% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 52.2%
Bachelor's Degree or Higher 20.9%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

209

Total Housing Units

183

Occupied Units

26

Vacant Units

2.43

Avg Household Size

Occupancy Type

Owner 76.5%
Renter 23.5%

$70,000

Median Home Value

-64% vs state

$818

Median Rent

1973

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 19 business establishments in ZIP 57633, employing approximately 99 people with a combined annual payroll of $4,225,000.

19

Businesses

99

Employees

$4.2M

Annual Payroll

2

Industry Sectors

Industry Establishments % of Total
Wholesale trade 4 21.1%
Accommodation and food services 4 21.1%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

More ZIP Codes in Dewey County

57625 standard
Eagle Butte, SD
Pop: 4,230
57656 standard
Timber Lake, SD
Pop: 723
57652 standard
Ridgeview, SD
Pop: 402
57636 standard
Lantry, SD
Pop: 164
57661 standard
Whitehorse, SD
Pop: 88
57630 standard
Glencross, SD
Pop: 32

Related Areas

Dewey County Isabel, SD South Dakota

Frequently Asked Questions

What county is ZIP code 57633 in? ▼
ZIP code 57633 (Isabel) is located in Dewey County, South Dakota. Dewey County contains multiple ZIP codes, see the full list at /counties/dewey-sd.
What is the population of ZIP code 57633? ▼
ZIP code 57633 in Isabel, SD has a population of 414 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57633? ▼
The median household income in ZIP 57633 is $78,750, which is 3% above the national average of $76,288.
What is the average home value in ZIP 57633? ▼
The median home value in ZIP 57633 is $70,000, which is 75% below the national average of $278,155.
What is the demographic makeup of ZIP 57633? ▼
The largest racial group in ZIP 57633 is White at 74.4%.
How many businesses are in ZIP code 57633? ▼
ZIP code 57633 has 19 business establishments employing approximately 99 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 57633? ▼
In ZIP code 57633, 52.2% of residents aged 25+ have a high school diploma or higher, and 20.9% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 57633? ▼
In ZIP code 57633, approximately 76.5% of occupied housing units are owner-occupied and 23.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57633? ▼
The poverty rate in ZIP code 57633 is 7.6% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.