PlainZIP

Parkton, MD · standard

ZIP Code 21120

Baltimore County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

6,967
64/sq mi
$162,052
Median income
$580,900
Median home value
64.2%
Bachelor's or higher

The verdict

Parkton pairs a top-decile household income with top-decile home values, in a rural, homeowner-dominated area.

Top 3%
household income, US ZIPs
Top 10%
home value, US ZIPs
64
people per sq mi
94%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21120 against every reporting US ZIP.

ZIP code 21120 is a mid-sized community (a standard USPS delivery area) in Parkton, Baltimore County, Maryland, home to 6,967 residents across 109.7 square miles, a density of 64 people per square mile, in the New York time zone.

ZIP 21120 skews affluent, with a median household income of $162,052 (42% above the Maryland average), while per-capita income is $74,584. 2.8% of residents live below the poverty line, and the unemployment rate reads 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.

This is a highly-educated ZIP: 64.2% of adults hold a bachelor's degree or higher, the median age is 40.8, and the average commute is 37 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 21120, plus 6 more within Baltimore County, give a clearer read than the national average alone.

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 21120

Top 5 sectors by establishment count in Parkton, MD

Which industries have the most business establishments in ZIP 21120.

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 · ZIP Code Business Patterns (ZBP) As of 2023

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 21120, Parkton, 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

6,967

Population

109.7

Area (sq mi)

64

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 21120?

40.8

Median Age

50.2%

Male

49.8%

Female

3.9%

Foreign-Born

White 87.4%
African American 2.0%
Asian 1.8%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 7.1%
Hispanic or Latino 4.5%

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

How ZIP 21120 ranks nationally

Parkton, MD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$162,052 Top 3% higher than 97% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). This entry sits in this band. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 78.8%
Bachelor's Degree or Higher 64.2%

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

Owner 93.8%
Renter 6.2%

$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 21120 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 21120 ranks #3 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 21120 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 21120 ranks the highest of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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

More ZIP Codes in Baltimore County

21234 standard
Parkville, MD
Pop: 69,752
21222 standard
Dundalk, MD
Pop: 55,786
21117 standard
Owings Mills, MD
Pop: 53,778
21207 standard
Gwynn Oak, MD
Pop: 48,133
21228 standard
Catonsville, MD
Pop: 47,577
21221 standard
Essex, MD
Pop: 42,154

Related Areas

Baltimore County Parkton, MD Maryland

Frequently Asked Questions

What county is ZIP code 21120 in? ▼
ZIP code 21120 (Parkton) is located in Baltimore County, Maryland. Baltimore County contains multiple ZIP codes, see the full list at /counties/baltimore-md-24005.
What is the population of ZIP code 21120? ▼
ZIP code 21120 in Parkton, MD has a population of 6,967 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21120? ▼
The median household income in ZIP 21120 is $162,052, which is 112% above the national average of $76,288.
What is the average home value in ZIP 21120? ▼
The median home value in ZIP 21120 is $580,900, which is 109% above the national average of $278,155.
What is the demographic makeup of ZIP 21120? ▼
The largest racial group in ZIP 21120 is White at 87.4%. Hispanic or Latino residents make up 4.5% of the population.
How many businesses are in ZIP code 21120? ▼
ZIP code 21120 has 174 business establishments employing approximately 1,026 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 21120? ▼
The top industries by establishment count in ZIP 21120 are: Construction (35), Professional, scientific, and technical services (25), Other services (except public administration) (19). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 21120? ▼
According to the FHFA House Price Index, home values in ZIP 21120 decreased by 0.4% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 123%. 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 21120? ▼
In ZIP code 21120, 78.8% of residents aged 25+ have a high school diploma or higher, and 64.2% 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 21120? ▼
The mean commute time for workers in ZIP code 21120 is 36.9 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 21120? ▼
In ZIP code 21120, approximately 93.8% of occupied housing units are owner-occupied and 6.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21120? ▼
The poverty rate in ZIP code 21120 is 2.8% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.