PlainZIP

Elk Mills, MD · standard

ZIP Code 21920

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

257
199/sq mi
$124,146
Median income
$356,000
Median home value
22.4%
Bachelor's or higher

The verdict

Elk Mills pairs a top-decile household income with above-median home values, in a rural, homeowner-dominated area.

Top 8%
household income, US ZIPs
Top 26%
home value, US ZIPs
199
people per sq mi
65%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21920 against every reporting US ZIP.

ZIP code 21920 is a sparsely populated ZIP (a standard USPS delivery area) in Elk Mills, Cecil County, Maryland, home to just 257 residents across 1.3 square miles, a density of 199 people per square mile, in the New York time zone.

ZIP 21920 skews affluent, with a median household income of $124,146 (9% above the Maryland average), while per-capita income is $34,843. The poverty rate stands at 10.0% and the unemployment rate at 0.0%. Median home value sits at $356,000 (20% below the state average), median rent at $1,346 a month, and owner-occupancy at 65.4%.

Educational attainment sits below the national norm: 22.4% of adults hold a bachelor's degree or higher, the median age is 36.7, and the average commute is -. Beyond these figures, 10 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Cecil County, letting you compare 21920 to its immediate surroundings rather than a national baseline 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 →

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 21920, Elk Mills, 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

257

Population

1.3

Area (sq mi)

199

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 21920?

36.7

Median Age

46.7%

Male

53.3%

Female

6.9%

Foreign-Born

White 78.5%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 8.8%
Hispanic or Latino 12.7%

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?

$124,146

Median Household Income

+9% vs state

$34,843

Per Capita Income

10.0%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 21920 ranks nationally

Elk Mills, MD household income vs. every US ZIP code

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

$124,146 Top 8% higher than 92% 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%). This entry sits in this band. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. 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 56.9%
Bachelor's Degree or Higher 22.4%

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

What does housing look like?

436

Total Housing Units

436

Occupied Units

0

Vacant Units

3.24

Avg Household Size

Occupancy Type

Owner 65.4%
Renter 34.6%

$356,000

Median Home Value

-20% vs state

$1,346

Median Rent

1983

Median Year Built

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

Nearby ZIP Codes

Want a side-by-side? Compare 21920 vs 21916 →

ZIP 21920 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 21920 ranks #0 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 21920 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 21920 ranks #3 of 8 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
21916 Childs, MD 37 2.1 mi
21921 Elkton, MD 44,471 2.7 mi
19717 Newark, DE 3,770 4.3 mi
19716 Newark, DE 1,568 4.3 mi
19713 Newark, DE 30,408 6.2 mi
19702 Newark, DE 51,899 5.9 mi
19350 Landenberg, PA 10,921 7.5 mi
19711 Newark, DE 51,322 6.1 mi
19352 Lincoln University, PA 10,622 8.9 mi
21901 North East, MD 15,875 8.5 mi

More ZIP Codes in Cecil County

21921 standard
Elkton, MD
Pop: 44,471
21901 standard
North East, MD
Pop: 15,875
21911 standard
Rising Sun, MD
Pop: 11,004
21904 standard
Port Deposit, MD
Pop: 7,252
21903 standard
Perryville, MD
Pop: 5,687
21918 standard
Conowingo, MD
Pop: 4,284

Related Areas

Cecil County Elk Mills, MD Maryland

Frequently Asked Questions

What county is ZIP code 21920 in? ▼
ZIP code 21920 (Elk Mills) is located in Cecil County, Maryland. Cecil County contains multiple ZIP codes, see the full list at /counties/cecil-md.
What is the population of ZIP code 21920? ▼
ZIP code 21920 in Elk Mills, MD has a population of 257 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21920? ▼
The median household income in ZIP 21920 is $124,146, which is 63% above the national average of $76,288.
What is the average home value in ZIP 21920? ▼
The median home value in ZIP 21920 is $356,000, which is 28% above the national average of $278,155.
What is the demographic makeup of ZIP 21920? ▼
The largest racial group in ZIP 21920 is White at 78.5%. Hispanic or Latino residents make up 12.7% of the population.
What is the education level in ZIP code 21920? ▼
In ZIP code 21920, 56.9% of residents aged 25+ have a high school diploma or higher, and 22.4% 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 21920? ▼
In ZIP code 21920, approximately 65.4% of occupied housing units are owner-occupied and 34.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21920? ▼
The poverty rate in ZIP code 21920 is 10.0% 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.