Martin, SD · standard
ZIP Code 57551
Bennett County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 2,279
- 1/sq mi
- $70,096
- Median income
- $161,900
- Median home value
- 25.6%
- Bachelor's or higher
The verdict
Martin pairs a below-median household income with below-median home values, in a rural, homeowner-dominated area.
- 47th pct
- household income, US ZIPs
- 31th pct
- home value, US ZIPs
- 1
- people per sq mi
- 65%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57551 against every reporting US ZIP.
ZIP code 57551 covers 1899.2 square miles in Martin, Bennett County, South Dakota (a standard USPS delivery area), with a modest 2,279 residents on file, a density of 1 people per square mile, in the Denver time zone.
ZIP 57551 lands in the middle-income range, with a median household income of $70,096 (8% below the South Dakota average), while per-capita income is $25,744. 20.5% of residents live below the poverty line, and the unemployment rate reads 7.1%. On housing, the median home value is $161,900 (16% below the state average) with median rent at $613 per month, and 64.9% of occupied units are owner-occupied.
Educational attainment sits below the national norm: 25.6% of adults hold a bachelor's degree or higher, the median age is 36, and the average commute is -. Compare these figures to the South Dakota and national benchmarks above rather than reading 57551's numbers 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 →
Top industries in ZIP 57551
Top 5 sectors by establishment count in Martin, SD
Which industries have the most business establishments in ZIP 57551.
- Retail trade
Retail trade
12 establishments
- Construction
Construction
11 establishments
- Health care and social assistance
Health care and social assistance
7 establishments
- Other services (except public administration)
Other services (except public administration)
7 establishments
- Information 4
Information
4 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
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 57551, Martin, 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
2,279
Population
1899.2
Area (sq mi)
1
People / sq mi
Denver
Time Zone
standard
ZIP Type
Who lives in ZIP 57551?
36.0
Median Age
48.4%
Male
51.6%
Female
2.6%
Foreign-Born
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?
$70,096
Median Household Income
-8% vs state
$25,744
Per Capita Income
20.5%
Poverty Rate
7.1%
Unemployment Rate
How ZIP 57551 ranks nationally
Martin, SD household income vs. every US ZIP code
Median household income, the full national distribution, with this ZIP marked
$70,096 47th percentile higher than 47% of 30,318 US ZIPs
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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
833
Total Housing Units
666
Occupied Units
167
Vacant Units
3.07
Avg Household Size
Occupancy Type
$161,900
Median Home Value
-16% vs state
$613
Median Rent
1967
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 56 business establishments in ZIP 57551, employing approximately 483 people with a combined annual payroll of $19,012,000.
56
Businesses
483
Employees
$19.0M
Annual Payroll
6
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 12 | 21.4% |
| Construction | 11 | 19.6% |
| Health care and social assistance | 7 | 12.5% |
| Other services (except public administration) | 7 | 12.5% |
| Information | 4 | 7.1% |
| Accommodation and food services | 4 | 7.1% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
More ZIP Codes in Bennett County
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Frequently Asked Questions
What county is ZIP code 57551 in? ▼
What is the population of ZIP code 57551? ▼
What is the median household income in ZIP 57551? ▼
What is the average home value in ZIP 57551? ▼
What is the demographic makeup of ZIP 57551? ▼
How many businesses are in ZIP code 57551? ▼
What are the main industries in ZIP code 57551? ▼
What is the education level in ZIP code 57551? ▼
What percentage of residents own vs. rent in ZIP 57551? ▼
What is the poverty rate in ZIP code 57551? ▼
Read our methodology to see how this data is sourced, computed, and verified.