21042Ellicott City, Maryland

Area Profile

Income, jobs, climate, physical risk and development data for ZIP code 21042.

Area Score unavailable

Missing required signals: opportunity, growth. AreaProfile withholds a score rather than inferring the missing dimensions.

How we calculate this

How this area ranks
SchoolsTop 2% of 4,422 ZIP areas measured91
Housing affordabilityTop 28% of 6,685 ZIP areas measured92
ClimateTop 37% of 6,789 ZIP areas measured73
Physical resilienceTop 3% of 6,709 ZIP areas measured95
AccessTop 36% of 6,791 ZIP areas measured96
Economic stabilityTop 10% of 6,742 ZIP areas measured81
The quick read

Rent takes 14% of median household income here, below the 30% threshold conventionally called cost-burdened, and the median home is 3.7 times that income.

Natural-hazard exposure is lower than in most comparable published ZIP profiles, placing 21042 in the top 3% for physical resilience.

A major airport is 14 miles away, giving the area unusually direct access to the national air network.

At a glance

Population
43,327
2024 ACS 5-Year
Median household income
$190,061
Top 1% nationally
Density
1,171/sq mi
37.0 sq mi of land
Median age
45.1
2024 ACS 5-Year
City
Ellicott City
Maryland
Metro area
Baltimore-Columbia-Towson, MD
Nearest major airport
BWI
14 mi · Baltimore/Washington Intl Thurgood Marshall
Median home value
$706,400
2024 ACS 5-Year

Jobs & opportunity

73% of adults hold a four-year degree, higher than 97% of measured US ZIP areas.

Household income is higher than at least 99% of measured US ZIP areas.

MetricValueCompared nationallySource period
Median household income ±$12,121$190,061Top 1%of 31,2952024 ACS 5-Year
Per capita income ±$3,556$77,643Top 4%of 32,8222024 ACS 5-Year
Poverty rate3.3%Bottom 12%of 32,9702024 ACS 5-Year
Average commute30.8 minTop 34%of 32,8872024 ACS 5-Year
Bachelor's degree or higher72.9%Top 3%of 33,1932024 ACS 5-Year
Labor force participation64.3%Top 35%of 33,2522024 ACS 5-Year
Mean annual wage$76,370Top 23%of 6,0722025 OEWS
Median annual wage$59,070Top 20%of 6,0722025 OEWS
Median household income, successive ACS releases
2021202220232024191k159k
Each point is a separate five-year estimate, most recently $190,061 in the 2024 ACS 5-Year. Consecutive releases share four years of sample, so AreaProfile shows them as a record of successive estimates and does not compute a year-over-year change from them.
Largest occupations — Baltimore-Columbia-Towson, MD
OccupationPeople employedMedian annual wage
General and Operations Managers44,960$117,040
Retail Salespersons39,920$34,800
Registered Nurses30,930$99,550
Secretaries and Administrative Assistants, Except Legal, Medical, and Executive29,780$49,220
Laborers and Freight, Stock, and Material Movers, Hand28,350$43,250
Home Health and Personal Care Aides26,880$37,640

Occupational employment and wages are published for metropolitan areas rather than for individual cities or ZIP areas, so these describe the wider labor market this location sits in. 2025 OEWS, U.S. Bureau of Labor Statistics.

44% of students met the state standard in mathematics and 52% in reading, across the schools here that reported results.

There are 14.2 students for every full-time teacher, fewer than in most measured places.

Public schools
13
2024-25 school year
Students per teacher
14.2
across all schools here
Math proficiency
44.4%
Top 3% in Maryland
Reading proficiency
52.3%
Top 4% in Maryland
SchoolDistrictStudentsPer teacherMathReading
Mount Hebron HighHoward County Public Schools1,45515.6
Centennial HighHoward County Public Schools1,37717.0
Waverly ElementaryHoward County Public Schools82713.658%56%
Burleigh Manor MiddleHoward County Public Schools77715.932%62%
Northfield ElementaryHoward County Public Schools76415.947%49%
Centennial Lane ElementaryHoward County Public Schools74914.163%54%
Manor Woods ElementaryHoward County Public Schools69713.749%52%
Folly Quarter MiddleHoward County Public Schools68214.527%57%
St. Johns Lane ElementaryHoward County Public Schools63614.549%41%
Dunloggin MiddleHoward County Public Schools62314.217%47%
Triadelphia Ridge ElementaryHoward County Public Schools61914.153%50%
Homewood SchoolHoward County Public Schools1092.6

16.7% of students here are eligible for free or reduced-price lunch. That describes the circumstances families arrive with rather than how the schools perform, which is why AreaProfile shows it and does not score it.

Public schools only, from the NCES Common Core of Data. Schools are placed by ZIP code, so this is which schools are in this place rather than which one a particular address is zoned for — district boundaries do not follow municipal ones, and enrollment zones change. Fully virtual schools are excluded: they enroll students from across the state while reporting one administrative address, and counting them here would describe a school population this place does not have. The assessment covers grades 3 through 8, so a high school shows no proficiency figure — a dash in those columns means the test was not given at that school, not that it performed badly. Proficiency is measured against Maryland’s own standard, so it compares cleanly within the state and only broadly against other states; AreaProfile therefore ranks it within state. The directory is current, while the proficiency figures are from the last school year with national coverage before the pandemic interrupted testing.

Housing & affordability

How it’s calculated →

Prices for everything a household buys run about 3% above the national average, on the Bureau of Economic Analysis index. Housing drives most of that difference.

Median rent of $2,183 takes 14% of median household income, below the 30% threshold at which a household is considered cost-burdened.

A median home costs 3.7 times median household income here, above the historic benchmark of about three times income.

Cost of living
103.2

Prices here run about 3% above the national average. The spread between places is driven mostly by housing — goods vary far less — and this excludes taxes.

Rent as a share of income
13.8%
Below the 30% cost-burdened threshold
Home price to income
3.7×
median home value ÷ median income
Median gross rent
$2,183
2024 ACS 5-Year
Median home value
$706,400
2024 ACS 5-Year
MetricValueCompared nationallySource period
Cost of living index103.2Top 34%of 6,0712023
Home price to income3.72Top 34%of 30,4042024 ACS 5-Year
Homeownership rate84.7%Top 33%of 32,9102024 ACS 5-Year
Housing units ±65115,368Top 8%of 33,7722024 ACS 5-Year
Median gross rent ±$104$2,183Top 6%of 26,6182024 ACS 5-Year
Median home value ±$15,172$706,400Top 6%of 30,9412024 ACS 5-Year
Rent as a share of income13.8%Bottom 22%of 26,4702024 ACS 5-Year
Vacancy rate1.8%Bottom 8%of 33,0282024 ACS 5-Year

Both affordability measures come from the same ACS release as the income they are compared with, so the comparison is like for like. They describe housing cost against local earnings and are not a cost-of-living index — transport, groceries, healthcare, insurance and taxes are not included, and a place can look affordable here and still be expensive to live in for reasons this does not capture.

Growth & development

How it’s calculated →

No building-permit activity is published for this location by the Census Building Permits Survey.

Weather & climate

7 of the twelve months have a normal average temperature between 55°F and 80°F. July averages a high of 89°F and January a low of 25°F.

Normal annual precipitation is 45.0 inches, including 19.3 inches of snow.

Air quality measures a median index of 32, in the Good band, and no day in the year passed 100.

10°30°50°70°90°JFMAMJJASOND
Solid line: normal daily high. Dashed line: normal daily low. 1991-2020 normals from NOAA station BALTIMORE WASH INTL AP, 13.6 miles from this location.
Precipitation
JFMAMJJASOND4.5"
Normal monthly precipitation, in inches.
MetricValueSource period
90th percentile air quality index54.02024 calendar year
Annual precipitation45.0"1991-2020 Normals
Annual snowfall19.3"1991-2020 Normals
Average January low25°F1991-2020 Normals
Average July high89°F1991-2020 Normals
Comfortable months71991-2020 Normals
Days above AQI 10002024 calendar year
Median air quality index32.02024 calendar year
Seasonal temperature swing44°F1991-2020 Normals
Air quality
Median air quality index
32
Good on a typical day
Worst tenth of days
54
90th percentile index
Days above 100
0
unhealthy for sensitive groups

A comfortable median and a bad tail are different problems. Wildfire smoke and summer ozone show up in the worst tenth of days, not in the middle of the year.

Climate figures are thirty-year normals, not current conditions. They describe what a typical year looks like rather than what the weather is doing today. Air quality is measured rather than modelled, by EPA monitors, and published by county only where a monitor sits — roughly half the counties AreaProfile publishes have one, and the rest show nothing rather than an estimate. Air masses are regional, so a county reading describes the air over a place reasonably well, but it is still the county reading.

Physical risk

95 / 100
Physical resilience

The hazards accounting for most of this area's expected annual loss are hurricane, cold wave and drought.

HurricaneModerate
DroughtModerate
Cold waveModerate
LandslideModerate

Low or minimal exposure: winter weather, heat wave, strong wind, lightning, inland flooding, earthquake, hail, ice storm, tornado, coastal flooding, wildfire.

Hazard ratings are AreaProfile calculations derived from the FEMA National Risk Index v1.20.0 (December 2025). FEMA publishes at county level. ZIP values are the land-area-weighted mean of the counties the ZIP Code Tabulation Area intersects. Expected annual loss is not allocated below county level. FEMA does not endorse this presentation. Higher physical resilience means lower exposure.

These are deaths, not offences — they say nothing about burglary, theft or assault.

Howard County records 3.9 homicide deaths per 100,000 residents a year, near the middle of counties measured. The CDC does not publish this below county level.

Firearm deaths of all intents run at 4.2 per 100,000 — more than the homicide rate, because nationally most firearm deaths are suicides.

Drug overdose deaths run at 6.2 per 100,000 residents in Howard County.

Homicide
3.9
per 100,000 residents · under 10 deaths
Firearm deaths, all intents
4.2
per 100,000 residents · under 10 deaths
Drug overdose
6.2
per 100,000 residents · under 10 deaths
Suicide
5.4
per 100,000 residents · under 10 deaths

Firearm deaths count every intent together, and nationally the majority are suicides rather than homicides. The two columns overlap and should not be added.

Age-adjusted rates from provisional death certificate records, published by the CDC for Howard County as a whole — these rates are not published below county level. A county can hold both a dense city centre and a suburb whose experience of it is nothing alike, so this describes the county around 21042 rather than 21042 itself. That is why AreaProfile shows these figures and does not put them in the Area Score. Where fewer than ten deaths were recorded the count is suppressed at source, and a rate built on single figures moves sharply between releases. What this measure has that reported crime does not: a death certificate is filed whether or not the local police agency submitted a return that year, so the figures stay comparable between places and over time.

What this profile does not cover

Three things people look for are missing from every AreaProfile page, and each is missing for a reason rather than by oversight. The Area Score is calculated without them and the weighting is documented on the methodology page.

Reported crime
Offences reported to police are published by department rather than by town, and only where a department reported every month of the year. No municipal department reports for this place — many smaller communities are policed by the county — so there is no figure to show. A partial year is never scaled up to look complete, and arrest counts or news volume are never substituted for it.
Taxes
Taxes are not published: no source covers them nationally with a method open enough to check. Cost of living now is — the index above is the Bureau of Economic Analysis price parity for this area — but it is a price level for all consumption rather than a budget for a household, its spread is driven mostly by housing, and it excludes taxes. Housing affordability is computed separately from rent, price and income, because that answers a narrower and more actionable question. Nothing here is individualised tax advice.
Anything about a specific address
Every figure describes an area, not a street or a house. School attendance zones, insurance pricing and the character of a neighbourhood all vary within the places measured here.

Access

4 major airports lie within 100 miles, the nearest 14 miles away.

AirportCodeDistanceLongest runway
Baltimore/Washington Intl Thurgood MarshallBWI14 mi10,503 ft
Washington Dulles IntlIAD38 mi11,500 ft
Harrisburg IntlMDT64 mi10,001 ft

Airport identity, position and runway data come from the FAA. “Major airport” is an AreaProfile classification — a public-use civil airport with a paved runway of at least 8,000 feet — not an FAA hub designation. Distances are straight-line, not driving distance.

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Data & methodology

Used forSourceSource periodUpdated
AccessFederal Aviation Administration
Airports (NASR) — Aeronautical Data Delivery Service
NASR current cycle28-day NASR cycle
Physical riskFederal Emergency Management Agency
National Risk Index
National Risk Index December 2025 (v1.20.0)Periodic dataset versions (v1.20.0 current)
ClimateNOAA National Centers for Environmental Information
U.S. Climate Normals 1991–2020 (Monthly)
1991-2020 NormalsEvery ten years (next release follows the 2001–2030 period)
HousingU.S. Bureau of Economic Analysis
Regional price parities and county personal income
2023Annually, each December
JobsU.S. Bureau of Labor Statistics
Occupational Employment and Wage Statistics
2025 OEWSAnnual (spring release)
Demographics, Housing, Income, JobsU.S. Census Bureau
American Community Survey 5-Year Estimates (Table-Based Summary File)
2024 ACS 5-YearAnnual (5-year estimates released each December)
safetyU.S. Centers for Disease Control and Prevention, National Center for Health Statistics
Provisional county-level mortality by intent
April, 2025 to March, 2026Quarterly, with a rolling twelve-month window alongside complete calendar years
schoolsU.S. Department of Education, National Center for Education Statistics
Common Core of Data and EDFacts assessments
2019-20 school year; 2024-25 school yearDirectory annually; assessment results as EDFacts releases them
ClimateU.S. Environmental Protection Agency, Air Quality System
Daily Air Quality Index by county
2024 calendar yearAnnually, once a calendar year is complete

Profile recalculated August 30, 2026. Recalculation is not the same as new source data — each figure above shows the period its source actually covers. Read the full methodology or browse every source.

21042 vs Ellicott City

How this ZIP area compares with Ellicott City as a whole. Both figures come from the same ACS release, so the comparison is like for like.

21042
Ellicott City
Median household income
$190,061
vs
$156,964
Per capita income
$77,643
vs
$67,822
Population density
1,171/sq mi
vs
2,508/sq mi
Median home value
$706,400
vs
$661,700
Median gross rent
$2,183
vs
$2,061
Homeownership rate
84.7%
vs
72.0%
Bachelor's degree or higher
72.9%
vs
68.8%
Poverty rate
3.3%
vs
3.7%
Median age
45.1
vs
43.2

Some demographic statistics use Census ZIP Code Tabulation Areas, which approximate but do not exactly match USPS ZIP delivery geography. See the methodology for how AreaProfile maps between them.