Groton, SD · standard
ZIP Code 57445
Brown County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 2,068
- 3/sq mi
- $84,948
- Median income
- $193,800
- Median home value
- 28.9%
- Bachelor's or higher
The verdict
Groton pairs an above-median household income with below-median home values, in a rural, homeowner-dominated area.
- Top 32%
- household income, US ZIPs
- 42th pct
- home value, US ZIPs
- 3
- people per sq mi
- 77%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57445 against every reporting US ZIP.
ZIP code 57445 covers 667.1 square miles in Groton, Brown County, South Dakota (a standard USPS delivery area), with a modest 2,068 residents on file, a density of 3 people per square mile, in the Chicago time zone.
ZIP 57445 lands in the middle-income range, with a median household income of $84,948 (11% above the South Dakota average), while per-capita income is $46,542. 3.5% of residents live below the poverty line, and the unemployment rate reads 3.3%. Median home value sits at $193,800 (1% above the state average), median rent at $1,015 a month, and owner-occupancy at 76.8%.
Educational attainment sits below the national norm: 28.9% of adults hold a bachelor's degree or higher, the median age is 38.3, and the average commute is -. Beyond these figures, 1 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Brown County, letting you compare 57445 to its immediate surroundings rather than a national baseline alone.
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 57445
Top 5 sectors by establishment count in Groton, SD
Which industries have the most business establishments in ZIP 57445.
- Retail trade
Retail trade
10 establishments
- Construction
Construction
9 establishments
- Wholesale trade
Wholesale trade
7 establishments
- Other services (except public administration)
Other services (except public administration)
6 establishments
- Finance and insurance
Finance and insurance
5 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 57445, Groton, 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
2,068
Population
667.1
Area (sq mi)
3
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 57445?
38.3
Median Age
54.3%
Male
45.7%
Female
2.8%
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?
$84,948
Median Household Income
+11% vs state
$46,542
Per Capita Income
3.5%
Poverty Rate
3.3%
Unemployment Rate
How ZIP 57445 ranks nationally
Groton, SD household income vs. every US ZIP code
Median household income, the full national distribution, with this ZIP marked
$84,948 Top 32% higher than 68% 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?
989
Total Housing Units
865
Occupied Units
124
Vacant Units
2.35
Avg Household Size
Occupancy Type
$193,800
Median Home Value
+1% vs state
$1,015
Median Rent
1975
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 66 business establishments in ZIP 57445, employing approximately 406 people with a combined annual payroll of $21,693,000.
66
Businesses
406
Employees
$21.7M
Annual Payroll
10
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 10 | 15.2% |
| Construction | 9 | 13.6% |
| Wholesale trade | 7 | 10.6% |
| Other services (except public administration) | 6 | 9.1% |
| Finance and insurance | 5 | 7.6% |
| Health care and social assistance | 5 | 7.6% |
| Transportation and warehousing | 4 | 6.1% |
| Agriculture, forestry, fishing and hunting | 3 | 4.5% |
| Real estate and rental and leasing | 3 | 4.5% |
| Administrative and support and waste management and remediation services | 3 | 4.5% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 57445 vs 57439 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 57439 | Ferney, SD | 52 | 9.3 mi |
More ZIP Codes in Brown County
Related Areas
Frequently Asked Questions
What county is ZIP code 57445 in? ▼
What is the population of ZIP code 57445? ▼
What is the median household income in ZIP 57445? ▼
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How many businesses are in ZIP code 57445? ▼
What are the main industries in ZIP code 57445? ▼
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What percentage of residents own vs. rent in ZIP 57445? ▼
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Read our methodology to see how this data is sourced, computed, and verified.