Seabrook, Maryland Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Seabrook, Maryland is 18,495 as of the 2023 American Community Survey, making it the 75th-largest city in Maryland. The median household income is $96,033, the median home value is $377,900, and the median age is 35.9.
18,495
Population
6015
People / sq mi
$96,033
Median Income
$377,900
Median Home Value
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Seabrook covers 3.1 sq mi of land at 6015 people per square mile.
About Seabrook, MD
Seabrook stands apart on settlement density — it is among the most densely settled of US cities, at roughly 6,015 people per square mile. Seabrook is a city in Maryland with a population of 18,495.
Household earnings are middling, with a median of $96,033 — above the US median of $78,538. About 8.0% of residents live below the federal poverty level, below the national 12.4%. Median home value is $377,900, with typical rent around $1,817.
34.2% of adults 25 and older hold a bachelor’s degree, near the national average of 35.0%. Around 12.9% of workers work from home, below the national 14.0%, and the average commute runs about 35 minutes each way.
That density explains much of the rest of the profile in Seabrook: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Race & Ethnicity
| White | 7.7% |
| Black or African American | 59.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.2% |
| Two or More Races | 0.0% |
Economy & Income
$96,033
Median Household Income
$37,244
Per Capita Income
8.0%
Poverty Rate
4.8%
Unemployment Rate
Housing
$377,900
Median Home Value
$1,817
Median Rent
65.6%
Owner-Occupied
Education
84.2%
High School+
34.2%
Bachelor's+
Commute
5.9%
Drive Alone
69.4%
Public Transit
12.9%
Work From Home
35.3 min
Avg Commute
Community Profile
32.8%
Foreign Born
56.9%
Non-English at Home
3.2%
Veterans
10.7%
With Disability
90.8%
Health Insurance
98.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 28.2% |
| Finance, Insurance & Real Estate | 13.8% |
| Construction | 10.8% |
| Public Administration | 9.3% |
| Education, Health Care & Social Services | 6.3% |
| Retail Trade | 6.2% |
| Information | 4.7% |
| Arts, Entertainment & Food Services | 3.3% |
| Manufacturing | 3.1% |
| Agriculture & Mining | 0.6% |
| Transportation & Warehousing | 0.4% |
Largest cities in Maryland
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Frequently Asked Questions
Seabrook, Maryland has a population of 18,495 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 75th-largest city in Maryland.
The median household income in Seabrook, Maryland is $96,033, with 8.0% of residents living below the federal poverty level.
The median home value in Seabrook, Maryland is $377,900, with median monthly rent at $1,817 and a homeownership rate of 65.6%.
The median age in Seabrook, Maryland is 35.9 years. The population is 45.9% male and 54.1% female.
Seabrook Cdp, MD Climate
Seabrook Cdp, MD has an average annual temperature of 13.4°C (56°F) and receives about 1112 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
13.4°C
Avg Temp
1112
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 1° / 33° | 83 mm |
| February | 3° / 37° | 72 mm |
| March | 7° / 45° | 97 mm |
| April | 13° / 55° | 85 mm |
| May | 18° / 64° | 114 mm |
| June | 23° / 73° | 93 mm |
| July | 25° / 78° | 108 mm |
| August | 24° / 76° | 100 mm |
| September | 21° / 69° | 99 mm |
| October | 14° / 58° | 88 mm |
| November | 9° / 47° | 89 mm |
| December | 4° / 38° | 84 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 Seabrook Cdp, MD
The most comfortable months to visit Seabrook Cdp, MD are typically September, June and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 31°C high). The coldest is January (near -4°C low). May is usually the wettest month.
Where to stay near Seabrook
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Population, race, income, age, and trends across Maryland
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.