Arnold, Maryland Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Arnold, MD Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A+
Health Top grade
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A+
Income Top grade
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A+
Education Top grade
Source: Map AI Methodology
Population
| Metric | Arnold | Maryland Avg | U.S. Average |
|---|---|---|---|
| Population | 24,040 | 6,204,886 | 337,468,954 |
| Population density (per sq mi) | 1773.6 | 500.2 | 86.4 |
| Population growth (%/yr) | 0.77% | 0.51% | 0.59% |
| Median age | 36.0 | 38.0 | 37.3 |
| Households | 8,732 | 2,362,551 | 130,235,071 |
Population in Arnold grew by 8.3% from 2009 to 2024, reaching 24,040 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Arnold is Gen X, aged 45–60, at 22.8% of residents. That is 1.7 points above Maryland as a whole.
- Gen Z 13–28 4,648 19.3% -0.9 pts
- Millennials 29–44 5,052 21.0% -1.3 pts
- Gen X 45–60 5,482 22.8% +1.7 pts
- Boomers 61–79 3,904 16.2% -0.3 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Maryland, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.6% of the people living in Arnold and men 48.4%.
- Women 51.6% Maryland 51.5%
- Men 48.4% Maryland 48.5%
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Economy
Arnold has a the economy index of A+, which means it is exceptionally prosperous.
| Metric | Arnold | Maryland Avg | U.S. Average |
|---|---|---|---|
| Median household income | $143,084 | $103,916 | $80,455 |
| Income growth (%/yr) | 3.41% | 3.98% | 4.80% |
| Unemployment rate | 2.5% | 4.8% | 5.2% |
The median household income in Arnold is about 38% higher than in Maryland.
Housing
| Metric | Arnold | Maryland Avg | U.S. Average |
|---|---|---|---|
| Median home price | $434,509 | $267,101 | $248,835 |
| Median rent | $2,137 | $1,704 | $1,407 |
| Homeownership rate | 86.4% | 67.6% | 65.2% |
The median home price in Arnold is about 16.9 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,137 per month for that long.
Commute Time & Mobility
Commuters in Arnold spend about 51 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 215 hours, about 8.9 full days, spent commuting.
| Metric | Arnold | Maryland Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.7 | 28.3 | 22.4 |
| Round-trip commute (min) | 51.5 | 56.5 | 44.8 |
| Yearly time spent (hours) | 215 | 236 | 187 |
| Estimated yearly cost | $6,651 | $7,301 | $5,790 |
| Work from home | 22.2% | 19.3% | 15.0% |
| Highway traffic (vehicles/day) | 21,472 | 16,437 | 8,813 |
| Local road traffic (vehicles/day) | 3,168 | 2,353 | 1,355 |
The average commute time in Arnold is 26 minutes, shorter than the 28 minutes in Maryland.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Arnold has a education index of A+, which means it is exceptionally educated.
| Metric | Arnold | Maryland Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 51.9% | 39.3% | 31.6% |
| Average household size | 2.73 | 2.57 | 2.53 |
Health
Arnold has a health index of A+, which means it is exceptionally healthy.
| Metric | Arnold | Maryland Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 82.1 | 78.4 | 78.3 |
| Self-rated poor health | 8.4% | 13.2% | 16.3% |
| Smokers | 10.4% | 15.9% | 19.0% |
Arnold, MD Compared With Nearby Cities
How Arnold, MD compares with the 1 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Arnold, MD | 24,040 | $143,084 #1/2 | $434,509 #2/2 | 25.7 min #2/2 |
| Annapolis, MD | 35,365 | $119,079 | $561,733 | 23.2 min |
Frequently Asked Questions
Common questions about Arnold, Maryland.
How big is Arnold, Maryland by population?
About 24,040 people live in Arnold, Maryland, in 8,732 households of 2.7 people on average. The median age is 36.0, close to the U.S. median of 37.3.
Is Arnold, Maryland urban or rural?
Averaged over its land area, Arnold, Maryland has 1,774 people per square mile, a density typical of urban and suburban areas. That is about 21 times the U.S. average of 86.
How affordable is housing in Arnold, Maryland?
The median home costs 3.0 times the median household income ($434,509 against $143,084), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $2,137 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in Arnold, Maryland?
Unemployment in Arnold, Maryland is only 2.5%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
What share of adults in Arnold, Maryland have a college degree?
51.9% of adults in Arnold, Maryland hold a bachelor's degree or higher (about 5 in 10), well above the U.S. share of 31.6%.
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