Rock Hall, MD · standard
ZIP Code 21661
Kent County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 2,653
- 32/sq mi Moderate-density area
- $90,492
- Median income Above-median income area
- $283,200
- Median home value Near-median home value
- 35.7%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Rock Hall pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.
- Top 26%
- household income, US ZIPs
- Top 36%
- home value, US ZIPs
- 32
- people per sq mi
- 75%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21661 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 21661 (Rock Hall, MD) rose +11.2% from 2023 to 2024. The all-transactions index moved from 265.9 in 2023 to 295.5 in 2024 (2000 = 100).
ZIP code 21661 covers 84.0 square miles in Rock Hall, Kent County, Maryland (a standard USPS delivery area), with a modest 2,653 residents on file, a density of 32 people per square mile, in the New York time zone.
ZIP 21661 lands in the middle-income range, with a median household income of $90,492 (21% below the average Maryland ZIP), while per-capita income is $53,038. The poverty rate is 11.8%, with unemployment at 1.2%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $283,200 (37% below the average Maryland ZIP), and median rent is $1,000; owner occupancy is 74.8%.
A solid share of residents have a four-year degree: 35.7% of adults hold a bachelor's degree or higher, the median age is 58.4, and the average commute is 24 minutes. The page also surfaces 1 ZIP codes within roughly 10 miles and 6 more in Kent County, so 21661 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 21661
Top 5 sectors by establishment count in Rock Hall, MD
Which industries have the most business establishments in ZIP 21661.
- Retail trade
Retail trade
13 establishments
- Arts, entertainment, and recreation
Arts, entertainment, and recreation
9 establishments
- Accommodation and food services
Accommodation and food services
9 establishments
- Other services (except public administration)
Other services (except public administration)
7 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 21661, Rock Hall, 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
2,653
Population
84.0
Area (sq mi)
32
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21661?
58.4
Median Age
42.3%
Male
57.7%
Female
4.1%
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?
$90,492
Median Household Income
-21% vs state ZIP avg
$53,038
Per Capita Income
11.8%
Poverty Rate
1.2%
Unemployment Rate
23.6 min
Mean Commute Time
How ZIP 21661 ranks among Maryland ZIPs
Rock Hall, 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)
$90,492 39th percentile higher than 39% 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
1,784housing units
1,784
Total Housing Units
1,311
Occupied Units
473
Vacant Units
1.97
Avg Household Size
Occupancy Type
$283,200
Median Home Value
-37% vs state ZIP avg
$1,000
Median Rent
1976
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
+11.2%
YoY Change (2024)
296
HPI Index (2000 = 100)
+196%
Total Change Since 2000
Home values in ZIP 21661 have increased 11.2% over the past year (2024). Since 2000, this ZIP has seen +196% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +0.8% | 192 |
| 2021 | +13.9% | 219 |
| 2022 | +18.6% | 259 |
| 2023 | +2.6% | 266 |
| 2024 | +11.2% | 296 |
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 62 business establishments in ZIP 21661, employing approximately 424 people with a combined annual payroll of $14,699,000.
62
Businesses
424
Employees
$14.7M
Annual Payroll
9
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 13 | 21.0% |
| Arts, entertainment, and recreation | 9 | 14.5% |
| Accommodation and food services | 9 | 14.5% |
| Other services (except public administration) | 7 | 11.3% |
| Health care and social assistance | 5 | 8.1% |
| Construction | 3 | 4.8% |
| Manufacturing | 3 | 4.8% |
| Real estate and rental and leasing | 3 | 4.8% |
| Professional, scientific, and technical services | 3 | 4.8% |
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 21661 vs 21620 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 21620 | Chestertown, MD | 12,853 | 8.9 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 21661, 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 (2,653 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Kent County
Related Areas
Frequently Asked Questions
What county is ZIP code 21661 in?
ZIP code 21661 (Rock Hall) is located in Kent County, Maryland. Kent County contains multiple ZIP codes, see the full list at /counties/kent-md.
What is the population of ZIP code 21661?
ZIP code 21661 in Rock Hall, MD has a population of 2,653 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21661?
The median household income in ZIP 21661 is $90,492, which is 19% above the national average of $76,288.
What is the average home value in ZIP 21661?
The median home value in ZIP 21661 is $283,200, which is 2% above the national average of $278,155.
What is the demographic makeup of ZIP 21661?
The largest racial group in ZIP 21661 is White at 89.0%. Hispanic or Latino residents make up 4.9% of the population.
How many businesses are in ZIP code 21661?
ZIP code 21661 has 62 business establishments employing approximately 424 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 21661?
The top industries by establishment count in ZIP 21661 are: Retail trade (13), Arts, entertainment, and recreation (9), Accommodation and food services (9). There are 9 industry sectors represented in total.
How have home values changed in ZIP code 21661?
According to the FHFA House Price Index, home values in ZIP 21661 increased by 11.2% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 196%. 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 21661?
In ZIP code 21661, 64.7% of residents aged 25+ have a high school diploma or higher, and 35.7% 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 21661?
The mean commute time for workers in ZIP code 21661 is 23.6 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 21661?
In ZIP code 21661, approximately 74.8% of occupied housing units are owner-occupied and 25.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21661?
The poverty rate in ZIP code 21661 is 11.8% 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 21661's numbers, next.
- See how ZIP 21661 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Rock Hall, 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.