ZIP Code 21128
standardSource:
Perry Hall · Baltimore County · Maryland
- Population
- 12,802
- Median income
- $128,069
- Median home value
- $449,500
- Bachelor's or higher
- 54.8%
- Land area
- 17.3 sq mi
740/sq mi
▲ 68% vs US
higher than 93% of US ZIPs
▲ 62% vs US
higher than 84% of US ZIPs
Median age 40.1
New York
ZIP code 21128 in Perry Hall, Maryland has a population of 12,802. The median household income is $128,069, which is 68% above the national average. Median home value is $449,500, 62% above the US average. 54.8% of residents hold a bachelor's degree or higher.
ZIP code 21128 is classified by USPS as a standard delivery area and covers roughly 17.3 square miles in Perry Hall, Baltimore County, Maryland. The area is home to 12,802 residents, producing a population density of 740 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 21128 against Maryland and the nation.
On the economic side, the median household income for ZIP 21128 sits at $128,069 (12% above the Maryland average), while per-capita income is $54,499. The poverty rate stands at 3.1% and the unemployment rate at 2.3%. On housing, the median home value is $449,500 (0% above the state average) with median rent at $1,935 per month, and 84.0% of occupied units are owner-occupied, a direct signal of whether 21128 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 54.8% of adults hold a bachelor's degree or higher, the median age is 40.1, and the average commute is 33 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Baltimore County, so you can benchmark 21128 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 21128
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 21128.
- Construction
Construction
34 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
33 establishments
- Other services (except public administration)
Other services (except public administration)
29 establishments
- Health care and social assistance
Health care and social assistance
24 establishments
- Retail trade
Retail trade
21 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 + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 21128, Perry Hall, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
12,802
Population
17.3
Area (sq mi)
740
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21128?
40.1
Median Age
50.6%
Male
49.4%
Female
18.9%
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?
$128,069
Median Household Income
+12% vs state
$54,499
Per Capita Income
3.1%
Poverty Rate
2.3%
Unemployment Rate
33.2 min
Mean Commute Time
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?
5,917
Total Housing Units
5,609
Occupied Units
308
Vacant Units
2.75
Avg Household Size
Occupancy Type
$449,500
Median Home Value
+0% vs state
$1,935
Median Rent
2000
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
+4.3%
YoY Change (2024)
238
HPI Index (2000 = 100)
+138%
Total Change Since 2000
Home values in ZIP 21128 have increased 4.3% over the past year (2024). Since 2000, this ZIP has seen +138% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +2.4% | 180 |
| 2021 | +9.5% | 197 |
| 2022 | +6.9% | 210 |
| 2023 | +8.7% | 228 |
| 2024 | +4.3% | 238 |
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 223 business establishments in ZIP 21128, employing approximately 2,023 people with a combined annual payroll of $82,766,000.
223
Businesses
2,023
Employees
$82.8M
Annual Payroll
13
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 34 | 15.3% |
| Professional, scientific, and technical services | 33 | 14.8% |
| Other services (except public administration) | 29 | 13.0% |
| Health care and social assistance | 24 | 10.8% |
| Retail trade | 21 | 9.4% |
| Administrative and support and waste management and remediation services | 19 | 8.5% |
| Accommodation and food services | 18 | 8.1% |
| Transportation and warehousing | 9 | 4.0% |
| Finance and insurance | 9 | 4.0% |
| Real estate and rental and leasing | 8 | 3.6% |
| Educational services | 5 | 2.2% |
| Arts, entertainment, and recreation | 5 | 2.2% |
| Wholesale trade | 3 | 1.4% |
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 21128 vs 21236 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 21236 | Nottingham, MD | 38,474 | 2.5 mi |
| 21162 | White Marsh, MD | 3,655 | 2.6 mi |
| 21087 | Kingsville, MD | 5,451 | 3.2 mi |
| 21051 | Fork, MD | 279 | 4.5 mi |
| 21156 | Upper Falls, MD | 358 | 3.3 mi |
| 21234 | Parkville, MD | 69,752 | 4.8 mi |
| 21082 | Hydes, MD | 654 | 5.2 mi |
| 21057 | Glen Arm, MD | 4,112 | 4.4 mi |
| 21220 | Middle River, MD | 39,199 | 5.0 mi |
| 21237 | Rosedale, MD | 30,059 | 5.4 mi |
More ZIP Codes in Baltimore County
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Frequently Asked Questions
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How many businesses are in ZIP code 21128? ▼
What are the main industries in ZIP code 21128? ▼
How have home values changed in ZIP code 21128? ▼
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What percentage of residents own vs. rent in ZIP 21128? ▼
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ZIP Code Research Guides
Official Data Resources for Perry Hall, MD
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.