ZIP 21770 vs ZIP 21778
A side-by-side comparison of ZIP Code 21770 and ZIP Code 21778: population, income, housing, and more.
ZIP 21770 and ZIP 21778 are ZIP Code areas in Maryland. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
ZIP 21770 has the higher population (7,815 vs 840 in ZIP 21778). ZIP 21770 has the higher median household income ($184,464 vs $110,489 in ZIP 21778). ZIP 21770 has the higher median home value ($599,700 vs $415,700 in ZIP 21778).
Population, income & housing
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| Population | 7,815 | 840 |
| Median age | 41.2 yrs | 51.8 yrs |
| Median household income | $184,464 | $110,489 |
| Median home value | $599,700 | $415,700 |
| Housing units | 2,448 | 363 |
| Homeownership rate | 98.0% | 95.2% |
| Bachelor's degree or higher | 54.5% | 23.1% |
| Unemployment rate | 2.2% | 0.0% |
Trends (ACS 5-year, 2019–2023)
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| Population | 5,513 → 7,815 (+41.8%) | 909 → 840 (-7.6%) |
| Median household income | $138,750 → $184,464 (+32.9%) | $74,375 → $110,489 (+48.6%) |
| Median home value | $419,100 → $599,700 (+43.1%) | $294,900 → $415,700 (+41.0%) |
| Median gross rent | $1,521 → $2,065 (+35.8%) | — |
ZIP 21770
5,5137,815
$138,750$184,464
$419,100$599,700
$1,521$2,065
ZIP 21778
909840
$74,375$110,489
$294,900$415,700
Age & race/ethnicity
Age distribution (share)
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| Under 5 | 4.3% | 7.3% |
| 5 to 17 | 17.6% | 9.8% |
| 18 to 24 | 6.3% | 12.3% |
| 25 to 34 | 11.1% | 1.8% |
| 35 to 44 | 17.5% | 6.2% |
| 45 to 54 | 11.1% | 18.6% |
| 55 to 64 | 13.2% | 15.6% |
| 65 to 74 | 14.2% | 16.8% |
| 75 and over | 4.7% | 11.8% |
Race & ethnicity (share)
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| White (non-Hispanic) | 76.0% | 100.0% |
| Black or African American | 5.0% | 0.0% |
| American Indian & Alaska Native | 0.0% | 0.0% |
| Asian | 12.0% | 0.0% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.0% | 0.0% |
| Two or more races | 3.1% | 0.0% |
| Hispanic or Latino | 3.9% | 0.0% |
Educational attainment (age 25+)
Share of adults 25+
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| No high school diploma | 1.5% | 6.1% |
| High school graduate | 17.6% | 35.7% |
| Some college or associate's | 26.4% | 35.2% |
| Bachelor's degree | 30.4% | 5.4% |
| Graduate or professional degree | 24.1% | 17.7% |
Commute to work
How workers get to work (share)
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| Drove alone | 64.6% | 58.2% |
| Carpooled | 9.6% | 24.5% |
| Public transit | 0.0% | 0.0% |
| Walked | 0.0% | 0.0% |
| Bicycle | 0.0% | 0.0% |
| Worked from home | 25.7% | 17.3% |
| Other means | 0.0% | 0.0% |
Housing
Units in structure (share)
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| 1-unit, detached | 97.1% | 92.8% |
| 1-unit, attached | 2.9% | 6.3% |
| 2 to 4 units | 0.0% | 0.0% |
| 5 to 19 units | 0.0% | 0.0% |
| 20 or more units | 0.0% | 0.0% |
| Mobile home & other | 0.0% | 0.8% |
Poverty & households
| ZIP 21770 | ZIP 21778 | |
|---|---|---|
| Poverty rate | 1.4% | 0.0% |
| Average household size | 3.26 | 2.54 |
| Mean commute (minutes) | 37 | 30 |
| Median year structure built | 1988 | 1970 |