Greensboro, MD · standard
ZIP Code 21639
Caroline County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 4,408
- 52/sq mi Moderate-density area
- $62,772
- Median income Near-median income area
- $269,400
- Median home value Near-median home value
- 13.5%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Greensboro pairs a below-median household income with above-median home values, in a rural, homeowner-dominated area.
- 34th pct
- household income, US ZIPs
- Top 39%
- home value, US ZIPs
- 52
- people per sq mi
- 72%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21639 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 21639 (Greensboro, MD) fell -1.5% from 2023 to 2024. The all-transactions index moved from 224.5 in 2023 to 221.1 in 2024 (2000 = 100).
ZIP code 21639 covers 85.1 square miles in Greensboro, Caroline County, Maryland (a standard USPS delivery area), with a modest 4,408 residents on file, a density of 52 people per square mile, in the New York time zone.
ZIP 21639 reports a modest median household income of $62,772 (45% below the average Maryland ZIP), while per-capita income is $33,990. The poverty rate is 10.3%, with unemployment at 2.1%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $269,400 (40% below the average Maryland ZIP), and median rent is $1,107; owner occupancy is 72.2%.
Formal educational attainment runs low here: just 13.5% of adults hold a bachelor's degree or higher, the median age is 37.7, and the average commute is 39 minutes. The page also surfaces 7 ZIP codes within roughly 10 miles and 6 more in Caroline County, so 21639 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 21639
Top 5 sectors by establishment count in Greensboro, MD
Which industries have the most business establishments in ZIP 21639.
- Construction
Construction
21 establishments
- Retail trade
Retail trade
12 establishments
- Other services (except public administration) 7
Other services (except public administration)
7 establishments
- Accommodation and food services 6
Accommodation and food services
6 establishments
- Health care and social assistance 5
Health care and social assistance
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 21639, Greensboro, MD · 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
4,408
Population
85.1
Area (sq mi)
52
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21639?
37.7
Median Age
46.5%
Male
53.5%
Female
12.4%
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?
$62,772
Median Household Income
-45% vs state ZIP avg
$33,990
Per Capita Income
10.3%
Poverty Rate
2.1%
Unemployment Rate
38.8 min
Mean Commute Time
How ZIP 21639 ranks among Maryland ZIPs
Greensboro, MD household income vs. every Maryland ZIP code
Median household income among 419 reporting Maryland ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$62,772 10th percentile higher than 10% of 419 Maryland ZIPs
Each bar is a $20K-wide band; taller bars hold more Maryland 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
1,916housing units
1,916
Total Housing Units
1,743
Occupied Units
173
Vacant Units
2.67
Avg Household Size
Occupancy Type
$269,400
Median Home Value
-40% vs state ZIP avg
$1,107
Median Rent
1977
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
-1.5%
YoY Change (2024)
221
HPI Index (2000 = 100)
+121%
Total Change Since 2000
Home values in ZIP 21639 have decreased 1.5% over the past year (2024). Since 2000, this ZIP has seen +121% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +1.3% | 172 |
| 2021 | +14.0% | 196 |
| 2022 | +9.7% | 215 |
| 2023 | +4.4% | 225 |
| 2024 | -1.5% | 221 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 73 business establishments in ZIP 21639, employing approximately 403 people with a combined annual payroll of $17,262,000.
73
Businesses
403
Employees
$17.3M
Annual Payroll
8
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 21 | 28.8% |
| Retail trade | 12 | 16.4% |
| Other services (except public administration) | 7 | 9.6% |
| Accommodation and food services | 6 | 8.2% |
| Health care and social assistance | 5 | 6.8% |
| Wholesale trade | 4 | 5.5% |
| Administrative and support and waste management and remediation services | 4 | 5.5% |
| Manufacturing | 3 | 4.1% |
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 21639 vs 21636 →
ZIP 21639 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 21629
Denton (21629)
9,555 residents
- 21639
Greensboro (21639)
4,408 residents
- 21660
Ridgely (21660)
4,063 residents
- 21640 1,632
Henderson (21640)
1,632 residents
- 19964 1,340
Marydel (19964)
1,340 residents
- 21636 1,186
Goldsboro (21636)
1,186 residents
- 21641 117
Hillsboro (21641)
117 residents
- 21644 111
Ingleside (21644)
111 residents
What this shows Among its immediate neighbors, ZIP 21639 ranks #2 by population - useful context the national average alone can't give.
ZIP 21639 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 19964
Marydel (19964)
$99,402 median income
- 21660
Ridgely (21660)
$80,469 median income
- 21629
Denton (21629)
$73,956 median income
- 21636
Goldsboro (21636)
$73,426 median income
- 21641
Hillsboro (21641)
$66,875 median income
- 21639
Greensboro (21639)
$62,772 median income
- 21640
Henderson (21640)
$53,558 median income
What this shows By household income, ZIP 21639 ranks #6 of 7 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 21639, both outside MD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (4,408 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Caroline County
Related Areas
Frequently Asked Questions
What county is ZIP code 21639 in?
ZIP code 21639 (Greensboro) is located in Caroline County, Maryland. Caroline County contains multiple ZIP codes, see the full list at /counties/caroline-md.
What is the population of ZIP code 21639?
ZIP code 21639 in Greensboro, MD has a population of 4,408 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21639?
The median household income in ZIP 21639 is $62,772, which is 18% below the national average of $76,288.
What is the average home value in ZIP 21639?
The median home value in ZIP 21639 is $269,400, which is 3% below the national average of $278,155.
What is the demographic makeup of ZIP 21639?
The largest racial group in ZIP 21639 is White at 66.6%. Hispanic or Latino residents make up 18.9% of the population.
How many businesses are in ZIP code 21639?
ZIP code 21639 has 73 business establishments employing approximately 403 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 21639?
The top industries by establishment count in ZIP 21639 are: Construction (21), Retail trade (12), Other services (except public administration) (7). There are 8 industry sectors represented in total.
How have home values changed in ZIP code 21639?
According to the FHFA House Price Index, home values in ZIP 21639 decreased by 1.5% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 121%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 21639?
In ZIP code 21639, 56.0% of residents aged 25+ have a high school diploma or higher, and 13.5% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 21639?
The mean commute time for workers in ZIP code 21639 is 38.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 21639?
In ZIP code 21639, approximately 72.2% of occupied housing units are owner-occupied and 27.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21639?
The poverty rate in ZIP code 21639 is 10.3% 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 21639's numbers, next.
- See how ZIP 21639 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Greensboro, MD 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.