NeighborhoodRanked

Zip Code 21140

MD · Population: 4,255

A
87/100
95
A+
Safety
89
A
Affordability
75
B+
Quality of Life
88
A
Jobs
Zip 21140, MD — boundary highlighted© OpenFreeMap · OpenStreetMap · US Census

About Zip Code 21140

Zip code 21140 is located in Maryland and is home to approximately 4,255 residents. It receives an overall grade of A (score: 87/100), based on safety, affordability, quality of life, and employment metrics.

This area has significantly lower crime rates than most of the country, making it one of the safer places to live.

With a median household income of $141,411 and home values around $554,000, this zip code offers strong affordability. Residents typically spend a manageable share of their income on housing.

The community is highly educated — 55.1% of adults hold a bachelor's degree or higher, well above the national average of ~33%.

The local job market is strong, with an unemployment rate of just 1.6%.

Scores are percentile-based: a score of 85 means this zip code ranks better than 85% of all US zip codes on that dimension. Data is sourced from the US Census Bureau (ACS 5-year estimates) and the FBI Uniform Crime Report.

Demographics & Economics

Median Income
$141,411
Home Value
$554,000
Rent
$1,879/mo
Median Age
43
College Educated
55.1%
Unemployment
1.6%
Owner-Occupied
97%
Rent Burden
15.9% of income

Score Breakdown

DimensionScoreGradeInterpretation
Safety95A+Lower crime = higher score
Affordability89ALower cost relative to income = higher
Quality of Life75B+Education, commute, ownership
Jobs & Economy88ALower unemployment = higher
Overall87AWeighted average

Methodology

All scores are percentile-based (0–100): a score of 85 means this zip code ranks better than 85% of all US zip codes on that metric. Safety uses FBI Uniform Crime Report state-level data (Phase 2 will add zip-level granularity). Economic and demographic data is from the US Census Bureau American Community Survey (ACS) 5-year estimates (2022).