ZIP 21631 vs ZIP 21640
A side-by-side comparison of ZIP Code 21631 and ZIP Code 21640: population, income, housing, and more.
ZIP 21631 and ZIP 21640 are ZIP Code areas in Maryland. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
ZIP 21631 has the higher population (2,580 vs 1,251 in ZIP 21640). ZIP 21631 has the higher median household income ($69,095 vs $65,952 in ZIP 21640). ZIP 21631 has the higher median home value ($307,800 vs $260,200 in ZIP 21640).
Population, income & housing
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| Population | 2,580 | 1,251 |
| Median age | 47.9 yrs | 41.8 yrs |
| Median household income | $69,095 | $65,952 |
| Median home value | $307,800 | $260,200 |
| Median gross rent | $1,528 | $1,625 |
| Housing units | 1,094 | 546 |
| Homeownership rate | 84.4% | 96.0% |
| Bachelor's degree or higher | 25.4% | 14.6% |
| Unemployment rate | 4.2% | 1.4% |
Trends (ACS 5-year, 2019–2023)
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| Population | 2,814 → 2,580 (-8.3%) | 1,499 → 1,251 (-16.5%) |
| Median household income | $69,934 → $69,095 (-1.2%) | $59,250 → $65,952 (+11.3%) |
| Median home value | $254,900 → $307,800 (+20.8%) | $206,300 → $260,200 (+26.1%) |
| Median gross rent | $1,054 → $1,528 (+45.0%) | $875 → $1,625 (+85.7%) |
ZIP 21631
2,8142,580
$69,934$69,095
$254,900$307,800
$1,054$1,528
ZIP 21640
1,4991,251
$59,250$65,952
$206,300$260,200
$875$1,625
Age & race/ethnicity
Age distribution (share)
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| Under 5 | 3.3% | 4.9% |
| 5 to 17 | 20.0% | 17.8% |
| 18 to 24 | 4.6% | 5.4% |
| 25 to 34 | 8.1% | 12.0% |
| 35 to 44 | 10.8% | 13.7% |
| 45 to 54 | 16.4% | 7.8% |
| 55 to 64 | 18.6% | 12.5% |
| 65 to 74 | 11.8% | 12.1% |
| 75 and over | 6.6% | 13.7% |
Race & ethnicity (share)
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| White (non-Hispanic) | 71.6% | 74.7% |
| Black or African American | 5.5% | 0.0% |
| American Indian & Alaska Native | 0.0% | 0.0% |
| Asian | 0.0% | 0.0% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.0% | 0.0% |
| Two or more races | 9.4% | 0.2% |
| Hispanic or Latino | 13.5% | 25.0% |
Educational attainment (age 25+)
Share of adults 25+
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| No high school diploma | 14.4% | 19.0% |
| High school graduate | 41.0% | 53.5% |
| Some college or associate's | 19.2% | 12.9% |
| Bachelor's degree | 16.5% | 13.1% |
| Graduate or professional degree | 9.0% | 1.4% |
Commute to work
How workers get to work (share)
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| Drove alone | 80.5% | 94.6% |
| Carpooled | 10.2% | 1.7% |
| Public transit | 0.7% | 0.0% |
| Walked | 0.0% | 2.7% |
| Bicycle | 0.0% | 0.0% |
| Worked from home | 8.6% | 1.0% |
| Other means | 0.0% | 0.0% |
Housing
Units in structure (share)
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| 1-unit, detached | 85.8% | 55.9% |
| 1-unit, attached | 6.3% | 0.0% |
| 2 to 4 units | 0.5% | 0.7% |
| 5 to 19 units | 1.2% | 0.0% |
| 20 or more units | 0.2% | 0.0% |
| Mobile home & other | 5.9% | 43.4% |
Poverty & households
| ZIP 21631 | ZIP 21640 | |
|---|---|---|
| Poverty rate | 6.1% | 8.8% |
| Average household size | 2.64 | 2.37 |
| Mean commute (minutes) | 21 | 33 |
| Median year structure built | 1978 | 1986 |