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 Low-density area
- $84,948
- Median income Above-median income area
- $193,800
- Median home value Near-median home value
- 28.9%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Groton pairs an above-median household income with below-median home values, in a rural, homeowner-dominated area.
- Top 32%
- household income, US ZIPs
- 42nd 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 average South Dakota ZIP), while per-capita income is $46,542. Both reported hardship measures are comparatively low in absolute terms: poverty is 3.5% and unemployment is 3.3%. Median home value is $193,800 (1% above the average South Dakota ZIP) and median rent is $1,015; 76.8% of occupied homes are owner-occupied.
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 -. The page also surfaces 1 ZIP codes within roughly 10 miles and 6 more in Brown County, so 57445 can be compared with both its immediate and county-level context.
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 ZIP avg
$46,542
Per Capita Income
3.5%
Poverty Rate
3.3%
Unemployment Rate
How ZIP 57445 ranks among South Dakota ZIPs
Groton, SD household income vs. every South Dakota ZIP code
Median household income among 337 reporting South Dakota ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$84,948 Top 30% higher than 70% of 337 South Dakota ZIPs
Each bar is a $20K-wide band; taller bars hold more South Dakota 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?
Housing stock: occupied vs vacant
989housing units
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 ZIP avg
$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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 57445, both outside SD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (2,068 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Brown County
Related Areas
Frequently Asked Questions
What county is ZIP code 57445 in?
ZIP code 57445 (Groton) is located in Brown County, South Dakota. Brown County contains multiple ZIP codes, see the full list at /counties/brown-sd.
What is the population of ZIP code 57445?
ZIP code 57445 in Groton, SD has a population of 2,068 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57445?
The median household income in ZIP 57445 is $84,948, which is 11% above the national average of $76,288.
What is the average home value in ZIP 57445?
The median home value in ZIP 57445 is $193,800, which is 30% below the national average of $278,155.
What is the demographic makeup of ZIP 57445?
The largest racial group in ZIP 57445 is White at 90.7%. Hispanic or Latino residents make up 4.2% of the population.
How many businesses are in ZIP code 57445?
ZIP code 57445 has 66 business establishments employing approximately 406 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 57445?
The top industries by establishment count in ZIP 57445 are: Retail trade (10), Construction (9), Wholesale trade (7). There are 10 industry sectors represented in total.
What is the education level in ZIP code 57445?
In ZIP code 57445, 56.5% of residents aged 25+ have a high school diploma or higher, and 28.9% 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 57445?
In ZIP code 57445, approximately 76.8% of occupied housing units are owner-occupied and 23.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57445?
The poverty rate in ZIP code 57445 is 3.5% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 57445's numbers, next.
- See how ZIP 57445 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Groton, SD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.