PlainZIP

Glenelg, MD · standard

ZIP Code 21737

Howard County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,458
111/sq mi
$250,001
Median income
$996,400
Median home value
75.8%
Bachelor's or higher

The verdict

Glenelg pairs a top-decile household income with top-decile home values, in a rural, homeowner-dominated area.

Top 1%
household income, US ZIPs
Top 2%
home value, US ZIPs
111
people per sq mi
93%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21737 against every reporting US ZIP.

ZIP code 21737 is a sparsely populated ZIP (a standard USPS delivery area) in Glenelg, Howard County, Maryland, home to just 1,458 residents across 13.2 square miles, a density of 111 people per square mile, in the New York time zone.

ZIP 21737 skews affluent, with a median household income of $250,001 (119% above the Maryland average), while per-capita income is $101,402. 0.2% of residents live below the poverty line, and the unemployment rate reads 0.2%. Median home value sits at $996,400 (123% above the state average), median rent at - a month, and owner-occupancy at 93.2%.

This is a highly-educated ZIP: 75.8% of adults hold a bachelor's degree or higher, the median age is 38.8, and the average commute is -. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 21737, plus 6 more within Howard County, give a clearer read than the national average alone.

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 →

Top industries in ZIP 21737

Top 5 sectors by establishment count in Glenelg, MD

Which industries have the most business establishments in ZIP 21737.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

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 21737, Glenelg, 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

1,458

Population

13.2

Area (sq mi)

111

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 21737?

38.8

Median Age

45.2%

Male

54.8%

Female

19.2%

Foreign-Born

White 60.2%
African American 11.6%
Asian 16.4%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 5.2%
Hispanic or Latino 0.4%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$250,001

Median Household Income

+119% vs state

$101,402

Per Capita Income

0.2%

Poverty Rate

0.2%

Unemployment Rate

How ZIP 21737 ranks nationally

Glenelg, MD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$250,001 Top 1% higher than 99% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). Below this entry. $180,000–$200,000: 186 US ZIPs (1%). Below this entry. $200,000–$220,000: 324 US ZIPs (1%). This entry sits in this band. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 84.7%
Bachelor's Degree or Higher 75.8%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

739

Total Housing Units

739

Occupied Units

0

Vacant Units

3.34

Avg Household Size

Occupancy Type

Owner 93.2%
Renter 6.8%

$996,400

Median Home Value

+123% vs state

2002

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 83 business establishments in ZIP 21737, employing approximately 678 people with a combined annual payroll of $39,442,000.

83

Businesses

678

Employees

$39.4M

Annual Payroll

12

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 28 33.7%
Retail trade 7 8.4%
Health care and social assistance 7 8.4%
Accommodation and food services 7 8.4%
Construction 5 6.0%
Administrative and support and waste management and remediation services 5 6.0%
Other services (except public administration) 5 6.0%
Finance and insurance 4 4.8%
Real estate and rental and leasing 4 4.8%
Wholesale trade 3 3.6%
Transportation and warehousing 3 3.6%
Arts, entertainment, and recreation 3 3.6%

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 21737 vs 21738 →

ZIP 21737 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 21737 ranks #9 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 21737 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 21737 ranks the highest of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
21738 Glenwood, MD 3,268 1.8 mi
21036 Dayton, MD 2,114 1.7 mi
20862 Brinklow, MD 343 4.9 mi
21723 Cooksville, MD 803 4.9 mi
20833 Brookeville, MD 7,735 3.9 mi
21794 West Friendship, MD 2,434 3.8 mi
20860 Sandy Spring, MD 2,396 7.4 mi
21029 Clarksville, MD 11,333 4.9 mi
20861 Ashton, MD 1,875 7.2 mi
21797 Woodbine, MD 8,839 6.1 mi

More ZIP Codes in Howard County

21043 standard
Ellicott City, MD
Pop: 42,246
21044 standard
Columbia, MD
Pop: 41,704
21045 standard
Columbia, MD
Pop: 38,288
21042 standard
Ellicott City, MD
Pop: 38,076
20723 standard
Laurel, MD
Pop: 28,972
21075 standard
Elkridge, MD
Pop: 26,344

Related Areas

Howard County Glenelg, MD Maryland

Frequently Asked Questions

What county is ZIP code 21737 in? ▼
ZIP code 21737 (Glenelg) is located in Howard County, Maryland. Howard County contains multiple ZIP codes, see the full list at /counties/howard-md.
What is the population of ZIP code 21737? ▼
ZIP code 21737 in Glenelg, MD has a population of 1,458 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21737? ▼
The median household income in ZIP 21737 is $250,001, which is 228% above the national average of $76,288.
What is the average home value in ZIP 21737? ▼
The median home value in ZIP 21737 is $996,400, which is 258% above the national average of $278,155.
What is the demographic makeup of ZIP 21737? ▼
The largest racial group in ZIP 21737 is White at 60.2%. Hispanic or Latino residents make up 0.4% of the population.
How many businesses are in ZIP code 21737? ▼
ZIP code 21737 has 83 business establishments employing approximately 678 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 21737? ▼
The top industries by establishment count in ZIP 21737 are: Professional, scientific, and technical services (28), Retail trade (7), Health care and social assistance (7). There are 12 industry sectors represented in total.
What is the education level in ZIP code 21737? ▼
In ZIP code 21737, 84.7% of residents aged 25+ have a high school diploma or higher, and 75.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 21737? ▼
In ZIP code 21737, approximately 93.2% of occupied housing units are owner-occupied and 6.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21737? ▼
The poverty rate in ZIP code 21737 is 0.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.