ZIP Code 21120
standardSource:
Parkton · Baltimore County · Maryland
- Population
- 6,967
- Median income
- $162,052
- Median home value
- $580,900
- Bachelor's or higher
- 64.2%
- Land area
- 109.7 sq mi
64/sq mi
▲ 112% vs US
higher than 97% of US ZIPs
▲ 109% vs US
higher than 90% of US ZIPs
Median age 40.8
New York
ZIP code 21120 in Parkton, Maryland has a population of 6,967. The median household income is $162,052, which is 112% above the national average. Median home value is $580,900, 109% above the US average. 64.2% of residents hold a bachelor's degree or higher.
ZIP code 21120 is classified by USPS as a standard delivery area and covers roughly 109.7 square miles in Parkton, Baltimore County, Maryland. The area is home to 6,967 residents, producing a population density of 64 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 21120 against Maryland and the nation.
On the economic side, the median household income for ZIP 21120 sits at $162,052 (42% above the Maryland average), while per-capita income is $74,584. The poverty rate stands at 2.8% and the unemployment rate at 1.7%. On housing, the median home value is $580,900 (30% above the state average) with median rent at $1,271 per month, and 93.8% of occupied units are owner-occupied, a direct signal of whether 21120 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 64.2% of adults hold a bachelor's degree or higher, the median age is 40.8, and the average commute is 37 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Baltimore County, so you can benchmark 21120 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 21120
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 21120.
- Construction
Construction
35 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
25 establishments
- Other services (except public administration)
Other services (except public administration)
19 establishments
- Health care and social assistance
Health care and social assistance
17 establishments
- Administrative and support and waste management and remediation services
Administrative and support and waste management and remediation services
14 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 21120, Parkton, 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
6,967
Population
109.7
Area (sq mi)
64
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21120?
40.8
Median Age
50.2%
Male
49.8%
Female
3.9%
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?
$162,052
Median Household Income
+42% vs state
$74,584
Per Capita Income
2.8%
Poverty Rate
1.7%
Unemployment Rate
36.9 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?
2,622
Total Housing Units
2,599
Occupied Units
23
Vacant Units
2.85
Avg Household Size
Occupancy Type
$580,900
Median Home Value
+30% vs state
$1,271
Median Rent
1987
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
-0.4%
YoY Change (2024)
223
HPI Index (2000 = 100)
+123%
Total Change Since 2000
Home values in ZIP 21120 have decreased 0.4% over the past year (2024). Since 2000, this ZIP has seen +123% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | -0.2% | 171 |
| 2021 | +9.7% | 188 |
| 2022 | +9.3% | 205 |
| 2023 | +9.0% | 224 |
| 2024 | -0.4% | 223 |
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 174 business establishments in ZIP 21120, employing approximately 1,026 people with a combined annual payroll of $55,113,000.
174
Businesses
1,026
Employees
$55.1M
Annual Payroll
14
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 35 | 20.1% |
| Professional, scientific, and technical services | 25 | 14.4% |
| Other services (except public administration) | 19 | 10.9% |
| Health care and social assistance | 17 | 9.8% |
| Administrative and support and waste management and remediation services | 14 | 8.1% |
| Finance and insurance | 13 | 7.5% |
| Real estate and rental and leasing | 9 | 5.2% |
| Retail trade | 7 | 4.0% |
| Information | 7 | 4.0% |
| Accommodation and food services | 7 | 4.0% |
| Wholesale trade | 6 | 3.5% |
| Manufacturing | 5 | 2.9% |
| Transportation and warehousing | 4 | 2.3% |
| Educational services | 4 | 2.3% |
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 21120 vs 21053 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 21053 | Freeland, MD | 3,305 | 3.8 mi |
| 21105 | Maryland Line, MD | 65 | 5.0 mi |
| 21152 | Sparks Glencoe, MD | 5,544 | 6.7 mi |
| 17349 | New Freedom, PA | 7,570 | 7.6 mi |
| 17361 | Shrewsbury, PA | 5,806 | 8.3 mi |
| 21161 | White Hall, MD | 5,490 | 6.1 mi |
| 17355 | Railroad, PA | 261 | 8.0 mi |
| 21111 | Monkton, MD | 4,903 | 7.0 mi |
| 21155 | Upperco, MD | 2,371 | 8.5 mi |
| 17327 | Glen Rock, PA | 7,565 | 10.1 mi |
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Frequently Asked Questions
What county is ZIP code 21120 in? ▼
What is the population of ZIP code 21120? ▼
What is the median household income in ZIP 21120? ▼
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What is the demographic makeup of ZIP 21120? ▼
How many businesses are in ZIP code 21120? ▼
What are the main industries in ZIP code 21120? ▼
How have home values changed in ZIP code 21120? ▼
What is the education level in ZIP code 21120? ▼
What is the average commute time in ZIP 21120? ▼
What percentage of residents own vs. rent in ZIP 21120? ▼
What is the poverty rate in ZIP code 21120? ▼
ZIP Code Research Guides
Official Data Resources for Parkton, 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.