21738
Zip code 21738: Glenwood, Maryland
Population
3,696
Median household income
$250K+
U.S. $81K
Median home value
$914K
U.S. $333K
Median rent
—
U.S. $1,413
Median age
41.2
U.S. 38.9
Land area
7 sq mi
530 people/sq mi
Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.
About 21738
21738 is a suburban zip code in Glenwood, Maryland (Howard County), covering 7 sq mi of land. About 3,696 people live here, or 530 per square mile. The median resident is 41.2 years old, compared with 38.9 nationally.
The median household income is $250,000+ a year, the Census Bureau's reporting limit (U.S.: $80,734). 2.4% of residents live below the poverty line (U.S.: 12.5%). The median home value is $914,300. 98% of occupied homes are lived in by their owners.
76% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 33.9 minutes each way, and 27% of workers work from home. The most common jobs among working residents are in management; healthcare; and business and finance.
How 21738 compares
Sorted from highest to lowest national percentile
- Median household income$250,000+99thStrengthU.S. $80,734 · MD $103,6784th of 414 in MD
- Homeownership rate98.2%99thStrengthU.S. 65.2% · MD 67.6%39th of 441 in MD
- Median earnings per worker$120,20899thStrengthU.S. $49,666 · MD $61,20017th of 443 in MD
- 98thStrengthU.S. 35.7% · MD 43.4%21st of 445 in MD
- Tech workers12.8%98thU.S. 3.8% · MD 6.4%30th of 444 in MD
- Per capita income$92,23597thStrengthU.S. $44,673 · MD $52,97919th of 446 in MD
- Residents under 1829.9%95thU.S. 22% · MD 22.2%19th of 446 in MD
- Median home value$914,30094thU.S. $332,700 · MD $419,90017th of 421 in MD
- 92ndU.S. 9.7% · MD 9%45th of 444 in MD
- Work from home26.9%91stU.S. 15.1% · MD 19.3%62nd of 444 in MD
- Average commute33.9 min89thWeaknessU.S. 26.4 min · MD 31.1 min145th of 421 in MD
- Broadband access95.5%80thStrengthU.S. 91% · MD 92.4%149th of 441 in MD
- Median age41.266thU.S. 38.9 · MD 39.4241st of 446 in MD
- 59thU.S. 10% · MD 8.7%170th of 444 in MD
- Veterans6.4%58thU.S. 6.2% · MD 6.8%264th of 446 in MD
- 55thU.S. 17.2% · MD 16.7%248th of 446 in MD
- 53rdU.S. 14.5% · MD 22.5%374th of 444 in MD
- 44thU.S. 14.1% · MD 16.6%184th of 446 in MD
- Population density530/sq mi33rdU.S. 95/sq mi · MD 639/sq mi210th of 446 in MD
- Diversity index32.627thU.S. 61.4 · MD 67.7284th of 446 in MD
- Population3,6966thU.S. 334,922,499 · MD 6,206,011258th of 446 in MD
- 5thStrengthU.S. 5.2% · MD 4.9%348th of 444 in MD
- Uninsured rate1.8%4thStrengthU.S. 8.4% · MD 6.3%341st of 444 in MD
- Poverty rate2.4%1stStrengthU.S. 12.5% · MD 9.4%373rd of 441 in MD
- 1stU.S. 10.1% · MD 7.7%429th of 441 in MD
- 1stStrengthU.S. 0.483 · MD 0.456375th of 438 in MD
| Measure | 21738 | Howard | MD | U.S. | National percentile | Rank in MD |
|---|---|---|---|---|---|---|
| Median household incomeStrength | $250,000+ | $149,763 | $103,678 | $80,734 | 4th of 414 | |
| Homeownership rateStrength | 98.2% | 71.5% | 67.6% | 65.2% | 39th of 441 | |
| Median earnings per workerStrength | $120,208 | $83,801 | $61,200 | $49,666 | 17th of 443 | |
| Bachelor's degree or higherStrength | 76.2% | 64.5% | 43.4% | 35.7% | 21st of 445 | |
| Tech workers | 12.8% | 11.9% | 6.4% | 3.8% | 30th of 444 | |
| Per capita incomeStrength | $92,235 | $67,501 | $52,979 | $44,673 | 19th of 446 | |
| Residents under 18 | 29.9% | 23.8% | 22.2% | 22% | 19th of 446 | |
| Median home value | $914,300 | $597,900 | $419,900 | $332,700 | 17th of 421 | |
| Healthcare workers | 14% | 9.7% | 9% | 9.7% | 45th of 444 | |
| Work from home | 26.9% | 26% | 19.3% | 15.1% | 62nd of 444 | |
| Average commuteWeakness | 33.9 min | 28.5 min | 31.1 min | 26.4 min | 145th of 421 | |
| Broadband accessStrength | 95.5% | 96.6% | 92.4% | 91% | 149th of 441 | |
| Median age | 41.2 | 39.8 | 39.4 | 38.9 | 241st of 446 | |
| Self-employed workers | 10% | 9.2% | 8.7% | 10% | 170th of 444 | |
| Veterans | 6.4% | 6% | 6.8% | 6.2% | 264th of 446 | |
| Residents 65 and older | 17.2% | 15.2% | 16.7% | 17.2% | 248th of 446 | |
| Government workers | 14% | 22.9% | 22.5% | 14.5% | 374th of 444 | |
| Foreign-born residents | 8.2% | 22.8% | 16.6% | 14.1% | 184th of 446 | |
| Population density | 530/sq mi | 1,340/sq mi | 639/sq mi | 95/sq mi | 210th of 446 | |
| Diversity index | 32.6 | 70.3 | 67.7 | 61.4 | 284th of 446 | |
| Population | 3,696 | 336,328 | 6,206,011 | 334,922,499 | 258th of 446 | |
| Unemployment rateStrength | 1.9% | 3.5% | 4.9% | 5.2% | 348th of 444 | |
| Uninsured rateStrength | 1.8% | 4.2% | 6.3% | 8.4% | 341st of 444 | |
| Poverty rateStrength | 2.4% | 5.2% | 9.4% | 12.5% | 373rd of 441 | |
| Housing vacancy | 0% | 3.4% | 7.7% | 10.1% | 429th of 441 | |
| Income inequality (Gini)Strength | 0.337 | 0.414 | 0.456 | 0.483 | 375th of 438 |
The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.
People
Age
4%Under 5
26%5–17
9%18–24
2%25–34
13%35–44
15%45–54
13%55–64
8%65–74
9%75+
Median age
41.2
Under 18
29.9%
65 and over
17.2%
Race and ethnicity
- White82%
- Black2%
- Hispanic5%
- Asian7%
- Native American0%
- Pacific Islander0%
- Other0.2%
- Multiracial5%
Diversity index
32.6
U.S. 61.4
Foreign-born
8.2%
U.S. 14.1%
Born in state
46.3%
Language spoken at home (households)
English only
84%
Spanish
4%
Other Indo-European
3%
Asian / Pacific
8%
Other
1%
Households
- Households
- 1,121
- Average household size
- 3.3
- Family households
- 88.1%
- Married couples
- 79.5%
- Living alone
- 8.4%
- Veterans (of adults)
- 6.4%
- Male / female
- 48% / 52%
Income and poverty
Household income distribution
<$25k
2%
$25–50k
0%
$50–75k
1%
$75–100k
0.8%
$100–150k
25%
$150–200k
7%
$200k+
63%
Median household income
21738
$250,000+
Howard Co.
$149,763
Maryland
$103,678
United States
$80,734
Per capita income
$92,235
U.S. $44,673
Poverty rate
2.4%
U.S. 12.5%
Households earning $150K+
70.8%
U.S. 23%
Income inequality (Gini)
0.337
U.S. 0.483
Housing
Median home value
21738
$914,300
Howard Co.
$597,900
Maryland
$419,900
United States
$332,700
Median gross rent
21738
—
Howard Co.
$2,099
Maryland
$1,705
United States
$1,413
Types of housing
Single-family
100%
2–4 units
0%
5–19 units
0%
20+ units
0%
Mobile home
0%
Boat, RV, van
0%
- Housing units
- 1,121
- Owner-occupied
- 98.2%
- Vacant
- 0%
- Median year built
- 1992
- Median rooms
- 9 or more
- Renters paying 30%+ of income
- —
- Renters paying 50%+ of income
- —
- Home value to income
- 3.7× (U.S. 4.1×)
Work and commute
How people get to work
Drove alone
59%
Carpooled
14%
Transit
0%
Walked
0%
Bicycle
0%
Worked from home
27%
Other
0%
Commute time (one way)
<10 min
8%
10–19
8%
20–29
30%
30–44
25%
45–59
15%
60+
15%
Average commute
33.9 min
U.S. 26.4 min
Unemployment
1.9%
U.S. 5.2%
In labor force
65.9%
U.S. 63.5%
Jobs and careers
What employed residents do, wherever they work
Occupations
Management
17%
Healthcare
14%
Business and finance
13%
Computer and math
13%
Engineering and science
9%
Sales
6%
Cleaning and personal care
6%
Education
6%
Office and admin
5%
Construction and repair
3%
Food service
3%
Transportation and moving
2%
Legal and social services
2%
Police and fire
0.8%
Arts, media and sports
0.6%
Farming, fishing and forestry
0%
Production
0%
Industries
Professional and technical services
30%
Education
14%
Health care and social assistance
11%
Other services
7%
Construction
7%
Finance, insurance and real estate
6%
Public administration
6%
Retail
5%
Manufacturing
4%
Restaurants and hotels
3%
Arts and recreation
2%
Transportation, warehousing and utilities
2%
Agriculture and mining
1%
Information
1%
Wholesale
0.8%
Admin, support and management
0.6%
Median earnings per worker
$120,208
U.S. $49,666
Self-employed
10%
U.S. 10%
Government workers
14%
U.S. 14.5%
Nonprofit workers
15.9%
U.S. 8.8%
Median earnings by type of work
| Type of work | 21738 | U.S. |
|---|---|---|
| Management, business, science and arts | $166,250 | $74,888 |
| Service | $12,750 | $26,804 |
| Sales and office | $68,276 | $40,476 |
| Construction and maintenance | $93,095 | $49,199 |
| Production and transportation | — | $39,989 |
Education, internet and health coverage
Highest education (adults 25+)
No diploma
2%
High school
7%
Some college
10%
Associate's
5%
Bachelor's
32%
Graduate
44%
- High school graduate or higher
- 98.3%
- Bachelor's degree or higher
- 76.2%
- Graduate or professional degree
- 44.3%
- Households with broadband
- 95.5%
- Cable, fiber or DSL
- 91.9%
- No internet access
- 4.5%
- Without health insurance
- 1.8%
- Limited-English households
- 2.6%
Geography
- City (USPS)
- Glenwood
- State
- Maryland
- County
- Howard County
- Center point
- 39.2798° N, 77.0267° W
- Land area
- 7 sq mi
- Water area
- under 0.1 sq mi
- Time zone
- Eastern Time (UTC-5, UTC-4 in summer)
- Zip type
- Residential delivery area
Zip codes near 21738
| Zip | City | Distance | IncomeMedian income |
|---|---|---|---|
| 21737 | Glenelg, MD | 2.2 mi | $250,000+ |
| 21036 | Dayton, MD | 3.3 mi | $218,036 |
| 21794 | West Friendship, MD | 3.5 mi | $231,466 |
| 21723 | Cooksville, MD | 3.6 mi | $241,250 |
| 21797 | Woodbine, MD | 4.2 mi | $189,241 |
| 21765 | Lisbon, MD · PO box | 4.7 mi | — |
| 20833 | Brookeville, MD | 5.2 mi | $204,375 |
| 21041 | Ellicott City, MD · PO box | 5.4 mi | — |
| 21150 | Simpsonville, MD · PO box | 5.4 mi | — |
| 21029 | Clarksville, MD | 5.8 mi | $243,542 |
| 20862 | Brinklow, MD | 6.9 mi | $189,667 |
| 21042 | Ellicott City, MD | 7.1 mi | $190,061 |
Zip codes like 21738 elsewhere
Matched on income, home values, age, density, education, housing and commuting
7609278% match
Southlake, TX
Income
$250K+
Home
$1M
Age
43.3
7873378% match
Austin, TX
Income
$206K
Home
$1M
Age
43.7
0793074% match
Chester, NJ
Income
$241K
Home
$771K
Age
44.6
0145073% match
Groton, MA
Income
$193K
Home
$743K
Age
41.5
6300571% match
Chesterfield, MO
Income
$198K
Home
$702K
Age
45.6
0385670% match
Newfields, NH
Income
$198K
Home
$646K
Age
44.1
Questions about 21738
What city is zip code 21738?
21738 is assigned to Glenwood, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.
What county is 21738 in?
21738 is in Howard County, Maryland.
What is the population of 21738?
About 3,696 people live in 21738, according to the Census Bureau's American Community Survey.
What time zone is 21738 in?
21738 is in Eastern Time.
What is the median household income in 21738?
The median household income in 21738 is $250,000+.
What zip codes are near 21738?
The closest zip codes to 21738 are 21737, 21036, 21794, 21723, 21797.
Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 21738, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.