Arnold, Maryland Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Arnold, Maryland is 23,866 as of the 2023 American Community Survey, making it the 62nd-largest city in Maryland. The median household income is $137,799, the median home value is $547,800, and the median age is 38.2.
23,866
Population
2206
People / sq mi
$137,799
Median Income
$547,800
Median Home Value
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Arnold covers 10.8 sq mi of land at 2206 people per square mile.
About Arnold, MD
Homeownership is the standout figure in Arnold: 85.6% of homes are owner-occupied, higher than the national rate. Arnold is a city in Maryland with a population of 23,866.
Median household income is $137,799, above the US median of $78,538. Poverty is relatively low for US cities at 2.4%, below the national 12.4%. A typical home is worth $547,800, with typical rent around $2,177.
About 59.4% of adults 25 and older have a bachelor’s degree, above the 35.0% national figure. Remote work is on the higher side at 21.2%, above the national 14.0%, and the average commute runs about 30 minutes each way.
The ownership rate anchors the housing story in Arnold, and tends to move with the age structure and home-value figures above.
Race & Ethnicity
| White | 81.2% |
| Black or African American | 4.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.2% |
| Two or More Races | 0.0% |
Economy & Income
$137,799
Median Household Income
$61,175
Per Capita Income
2.4%
Poverty Rate
2.1%
Unemployment Rate
Housing
$547,800
Median Home Value
$2,177
Median Rent
85.6%
Owner-Occupied
Education
98.0%
High School+
59.4%
Bachelor's+
Commute
0.4%
Drive Alone
70.3%
Public Transit
21.2%
Work From Home
30.3 min
Avg Commute
Community Profile
37.0%
Foreign Born
88.2%
Non-English at Home
11.5%
Veterans
10.1%
With Disability
98.0%
Health Insurance
99.0%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 22.7% |
| Finance, Insurance & Real Estate | 19.2% |
| Public Administration | 12.3% |
| Education, Health Care & Social Services | 8.6% |
| Information | 6.6% |
| Construction | 5.3% |
| Manufacturing | 4.3% |
| Arts, Entertainment & Food Services | 4.2% |
| Retail Trade | 3.1% |
| Transportation & Warehousing | 1.2% |
| Agriculture & Mining | 0.3% |
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Frequently Asked Questions
Arnold, Maryland has a population of 23,866 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 62nd-largest city in Maryland.
The median household income in Arnold, Maryland is $137,799, with 2.4% of residents living below the federal poverty level.
The median home value in Arnold, Maryland is $547,800, with median monthly rent at $2,177 and a homeownership rate of 85.6%.
The median age in Arnold, Maryland is 38.2 years. The population is 49.1% male and 50.9% female.
Arnold Cdp, MD Climate
Arnold Cdp, MD has an average annual temperature of 13.2°C (56°F) and receives about 1117 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
13.2°C
Avg Temp
1117
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 1° / 34° | 84 mm |
| February | 2° / 36° | 73 mm |
| March | 7° / 44° | 101 mm |
| April | 12° / 54° | 86 mm |
| May | 18° / 64° | 109 mm |
| June | 22° / 72° | 96 mm |
| July | 25° / 77° | 106 mm |
| August | 24° / 75° | 105 mm |
| September | 20° / 69° | 99 mm |
| October | 14° / 58° | 81 mm |
| November | 9° / 48° | 87 mm |
| December | 4° / 39° | 90 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Arnold Cdp, MD
The most comfortable months to visit Arnold Cdp, MD are typically September, June and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -3°C low). May is usually the wettest month.
Where to stay near Arnold
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.