| City: | Isabel, South Dakota |
| City Alias: | Firesteel |
| Names to Avoid: | Lightcap |
| Counties: | Dewey County[Primary] Corson County Ziebach County |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 6:06:59 AM |
| Population: | 404 [See All] |
| Area Code: | 605 |
| Classification: | Standard [Normal Street Delivery] |
| Coordinates: | 45.4983, -101.4485 |
| Land Area: | 812.636 sq mi |
| Quick Link: |
ZIP Code 57633 has 404 residents and 177 households (average 2.28 persons per household). The median age is 39.9 years, slightly older than the state (37.7) and slightly older than the nation (38.8). The gender split is 50.0% male and 50.0% female, which is about the same as the national male share (49.1%). Largest groups are White (69.1%, much lower than the state average of 80.7% and well above the national average of 61.6%) and American Indian & Alaska Native (22.5%, much higher than the state average of 8.8% and well above the national average of 1.1%); Hispanic or Latino residents make up 0.2%, which is much lower than the national average (18.7%), and American Indian & Alaska Native share is much higher than both the state (8.8%) and national averages (1.1%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 404Source: Census DHC |
| 2023 ACS Population Estimate: | 421Source: Census ACS |
| 2025 ZC Population Estimate: | 166Source: ZIP-Codes.com |
| Population Density: | 0.5 people per sq mile |
| Average Income: | $88,750Source: Census ACS |
| Households: | 177Source: Census DHC |
| Average House Value: | $63,300Source: Census ACS |
| Persons Per Household: | 2.28Source: Census DHC |
| Average Family Size: | 2.71Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 615 | 558 | 537 | 447 | 458 | 435 | 437 | 427 | 400 | 417 | 415 | 402 | 421 |
| Decennial Census | 414 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 404 | -- | -- | -- |
Median Age: 39.9
Male Median Age: 39.6
Female Median Age: 40.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 9 | 15 | 17 | 13 | 12 | 14 | 11 | 13 | 13 | 6 | 8 | 8 | 28 | 12 | 9 | 8 | 4 | 2 |
| Female | 6 | 12 | 17 | 11 | 3 | 13 | 18 | 20 | 7 | 7 | 12 | 17 | 17 | 13 | 13 | 5 | 3 | 8 |
| Total | 15 | 27 | 34 | 24 | 15 | 27 | 29 | 33 | 20 | 13 | 20 | 25 | 45 | 25 | 22 | 13 | 7 | 10 |
| White: | 279 | 75.00% |
| Black: | 1 | 0.27% |
| Hispanic:* | 1 | 0.27% |
| Asian: | 0 | 0% |
| American Indian: | 91 | 24.46% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 372 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 202 | 50.00% | 39.6 years |
| Females: | 202 | 50.00% | 40.5 years |
| Total: | 404 | 100% | 39.9 years |
| Native, born in the United States: | 420 | 99.76% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 1 | 0.24% |
| Foreign born, not a U.S. citizen: | 0 | 0.24% |
| Total Population: | 421 | 100% |
| Total Native Population: | 420 | 99.76% |
| Total Foreign-born Population: | 1 | 0.24% |
In 2023, the Median household income is $88,750, which is much higher than the state median ($72,421), is up $37,500 (73.2%) since 2011 and above its 2019 pre-pandemic level by $13,333. Family households earn a median of $113,000 versus $52,222 for nonfamily households (a difference of $60,778). By gender, male median income is $70,625 and female is $37,292, which is far less than the national female median ($53,445), with a current gap of $33,333 that has widened from 2011 to 2023. The labor-force participation rate is 79.0%, which is far greater than the national rate (63.5%). The unemployment rate is 3.5%, which is generally lower than the national rate (5.2%). The largest occupation group is Management (46.4%).
Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $51,250 | $57,500 | $54,792 | $56,875 | $52,885 | $52,500 | $56,923 | $56,932 | $75,417 | $63,750 | $70,250 | $71,250 | $88,750 |
| Median Family Income | $63,750 | $68,750 | $63,833 | $65,139 | $54,479 | $57,917 | $68,125 | $66,250 | $80,000 | $73,750 | $83,125 | $88,750 | $113,000 |
| Median NonFamily Income | $14,792 | $15,625 | $16,563 | $23,500 | $27,083 | $25,938 | $42,500 | $46,875 | $41,875 | $60,179 | $52,500 | $52,750 | $52,222 |
| Median Male Income | $44,219 | $41,458 | $43,750 | $40,938 | $36,786 | $32,045 | $51,154 | $51,806 | $53,750 | $54,737 | $63,250 | $68,889 | $70,625 |
| Median Female Income | $30,066 | $31,050 | $30,982 | $37,778 | $35,750 | $29,583 | $28,750 | $34,063 | $38,333 | $26,500 | $29,375 | $35,000 | $37,292 |
| Employed: | 250 | 76.22% |
| Unemployed: | 9 | 2.74% |
| Not In Labor Force: | 69 | 21.04% |
| Total: | 328 | 100% |
| Management, business, science, and arts: | 116 | 46.40% |
| Service: | 18 | 7.20% |
| Sales and Office: | 42 | 16.80% |
| Natural resources, construction, and maintenance: | 53 | 21.20% |
| Production, transportation, and material moving: | 21 | 8.40% |
| Total Civilian Employed Population: | 250 | 100% |
In 2023, the median home value is $63,300, which is well under the national median ($303,400), is up $18,700 (41.93%) since 2011 and below its 2019 pre-pandemic level by $6,700. The median gross rent is $756, which is well under the national median ($1,348), is up $266 (54.29%) since 2011 and above its 2019 pre-pandemic level by $181. Of occupied housing, owners make up 77.27% (17.65% with a mortgage, 82.35% free-and-clear) and renters 22.73% - making this ZIP Code more home ownership than the state and under national rental averages. The vacancy rate is 12.00%, which is markedly above the national rate (10.43%).
Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $44,600 | $49,500 | $53,100 | $72,300 | $78,300 | $67,500 | $65,000 | $72,500 | $70,000 | $69,000 | $65,800 | $71,700 | $63,300 |
| Less than $500: | 2 | 5.00% |
| $500 to $999: | 28 | 70.00% |
| $1,000 to $1,499: | 0 | 0.00% |
| $1,500 to $1,999: | 0 | 0.00% |
| $2,000 to $2,499: | 0 | 0.00% |
| $2,500 to $2,999: | 0 | 0.00% |
| $3,000 or more: | 0 | 0.00% |
| No Rent: | 10 | 25.00% |
| Total: | 40 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $490 | $545 | $515 | $500 | $533 | $500 | $505 | $500 | $575 | $617 | $650 | $738 | $756 |
| Owner Occupied (with mortgage): | 24 | 13.64% |
| Owner Occupied (free and clear, no mortgage): | 112 | 63.64% |
| Renter Occupied: | 40 | 22.73% |
| Total Occupied Housing Units: | 176 | 100% |
| Occupied Housing Units: | 176 | 88.00% |
| Vacant Housing Units (not graphed): | 24 | 12.00% |
| Total Housing Units: | 200 | 100% |
| Single-Family Units: | 156 | 78.00% |
| Multi-Family Units: | 0 | 0.00% |
| Other Units: | 44 | 22.00% |
| Total Housing Units: | 200 | 100% |
In 2023, 20.20% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.00%). High school or higher is 91.70%, which is comparable to the national rate (89.40%). The uninsured rate is 9.50%, which is comparable to the national rate (8.60%). The share of people in poverty is 1.70%, which is far lower than the national rate (8.70%), down 8.20 percentage points since 2011 and below its 2019 pre-pandemic level by 4.70 percentage points. This points to a pronounced improvement in local conditions - rising incomes, firmer consumer demand, and a stronger tax base. Among residents ages 3+, the largest enrollment group is elementary (47.87%). College enrollment is 11.70%, which is far lower than the national rate (26.70%), indicating the community may be more oriented toward vocational/trade or direct-to-workforce opportunities.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 9 | 3.25% |
| 9th to 12th grade, no diploma: | 14 | 5.05% |
| High school graduate (includes equivalency): | 77 | 27.80% |
| Some college, no degree: | 79 | 28.52% |
| Associate's degree: | 42 | 15.16% |
| Bachelor's degree: | 36 | 13.00% |
| Graduate or professional degree: | 20 | 7.22% |
| Total: | 277 | 100% |
| High school or higher: | 254 | 91.70% |
| Bachelor's degree or higher: | 56 | 20.22% |
| Private Insurance: | 320 | 64.00% |
| Public Insurance: | 140 | 28.00% |
| No Insurance: | 40 | 8.00% |
| Total: | 500 | 100% |
| Has Health Insurance: | 460 | 92.00% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 9.9% | 6.4% | 8.0% | 4.1% | 8.0% | 8.8% | 11.5% | 7.9% | 6.4% | 5.6% | 4.7% | 3.4% | 1.7% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 3 | 3.19% |
| Kindergarten: | 4 | 4.26% |
| Elementary school (grades 1-8): | 45 | 47.87% |
| High school (grades 9-12): | 31 | 32.98% |
| College or graduate school: | 11 | 11.70% |
| Total: | 94 | 100% |
| Early Childhood: | 7 | 7.45% |
| K-12 (Primary & Secondary School): | 80 | 85.11% |
ZIP Code 57633 supports both business and residential activity. According to the Business Census (2023), there are 19 business establishments, employing about 99 people with an annual payroll of $4,225,000. USPS data shows 73 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 73Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 213Source: USPS |
| Single Family Delivery Units: | 73Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 19Source: CBP |
| 1st Quarter Payroll: | $1,022,000Source: CBP |
| Annual Payroll: | $4,225,000Source: CBP |
| # of Employees: | 99Source: CBP |
ZIP Code 57633 is located in Dewey County, South Dakota, within the Metropolitan Statistical Area (CBSA ). This area has a population of 0 people, about 0.00% of whom live in ZIP Code 57633. It covers 812.636 sq mi of land and a water area of 2.721 sq mi.
| CBSA Name: | --Source: Census |
| CBSA Number: | --Source: Census |
| CBSA Type: | --Source: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | Source: Census |
| Land Area: | 812.636 sq miSource: Census |
| Water Area: | 2.721 sq miSource: Census |
| Congressional District: | No DistrictsSource: USPS |
| Congressional Land Area: | sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4632140Source: Census |
| Place Name: | Isabel town; South DakotaSource: Census |
We could not locate which school district 57633 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on December 1, 2025.