Maryland Line, MD · standard
ZIP Code 21105
Baltimore County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 65
- 214/sq mi High-density area
- 38.9%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Maryland Line has 65 residents, placing it among the least populous of the 33,099 US ZIP codes with a reported population, at 214 people per square mile.
Source: USPS ZIP record + U.S. Census Bureau ZIP population. Rank compares ZIP 21105 against every US ZIP with a reported population; income/home-value percentiles are not available for this ZIP.
ZIP code 21105 is a sparsely populated ZIP (a standard USPS delivery area) in Maryland Line, Baltimore County, Maryland, home to just 65 residents across 0.3 square miles, a density of 214 people per square mile, in the New York time zone.
With fewer than 100 residents on file, this page keeps the Census figures below and skips the multi-chart expansion used on larger ZIPs. Small-N ACS estimates are already unstable enough without padding the page around them.
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 →
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 21105, Maryland Line, 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
65
Population
0.3
Area (sq mi)
214
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21105?
-
Median Age
38.9%
Male
61.1%
Female
0.0%
Foreign-Born
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
0.0%
Poverty Rate
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
14housing units
14
Total Housing Units
14
Occupied Units
0
Vacant Units
2.57
Avg Household Size
Occupancy Type
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 9 business establishments in ZIP 21105, employing approximately 61 people with a combined annual payroll of $3,504,000.
9
Businesses
61
Employees
$3.5M
Annual Payroll
0
Industry Sectors
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 21105 vs 17349 →
Related Areas
Frequently Asked Questions
What county is ZIP code 21105 in?
ZIP code 21105 (Maryland Line) 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 21105?
ZIP code 21105 in Maryland Line, MD has a population of 65 according to the Census Bureau ACS 2023 estimates.
Take this with you
What to do with ZIP 21105's numbers, next.
- See how ZIP 21105 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Maryland Line, 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.