Baltimore County, Maryland Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 3rd-largest in Maryland
The population of Baltimore County, Maryland is 849,586 as of the 2023 American Community Survey, making it the 3rd-largest county in Maryland. The median household income is $90,904, the median home value is $330,000, and the median age is 39.5.
The population of Baltimore County has grown 5.7% since 2010 (806,654 → 852,425), a +0.39% annualized rate.
849,586
Population
+0.39%
Annual growth
1420
People / sq mi
$90,904
Median Income
$330,000
Median Home Value
Baltimore County covers 598 sq mi of land at 1419.9 people per square mile.
About Baltimore County, MD
Baltimore County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 1,420 people per square mile. With 849,586 residents, Baltimore County is a county in Maryland. That makes it one of the ten largest counties in Maryland in the country, at #3 by population.
Earnings sit at the high end: a median household income of $90,904, above the US median of $78,538. Poverty is relatively low for US counties at 6.9%, below the national 12.4%. Home values run above average at $330,000, with typical rent around $1,566.
Baltimore County is among the best-educated US counties: 41.4% of adults 25 and older hold a bachelor’s degree, above the national 35.0%. Remote work is on the higher side at 14.2%, close to the national 14.0%, and the average commute runs about 28 minutes each way.
That density explains much of the rest of the profile in Baltimore County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Baltimore County Population History (2010-2024)
The county of Baltimore County had a population of 806,654 in 2010 and 852,425 in 2024, a 5.7% growth over 14 years. The peak was 853,338 in 2020. Average annual growth rate: 0.40%.
852,425
Population (2024)
806,654
Population (2010)
853,338
Peak (2020)
0.40%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 806,654 |
| 2011 | 813,021 |
| 2012 | 818,218 |
| 2013 | 822,426 |
| 2014 | 825,201 |
| 2015 | 827,796 |
| 2016 | 828,941 |
| 2017 | 828,956 |
| 2018 | 828,547 |
| 2019 | 828,503 |
| 2020 | 853,338 |
| 2021 | 850,670 |
| 2022 | 848,873 |
| 2023 | 848,676 |
| 2024 | 852,425 |
Race & Ethnicity
| White | 54.1% |
| Black or African American | 30.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.2% |
| Two or More Races | 0.0% |
Age & Sex
39.5
Median Age
52.4%
Female
47.6%
Male
17.7%
Age 65+
Age Distribution
Children (under 15): 18.1% · Seniors (65+): 17.7%
Income & Poverty
| Median household income | $90,904$-10,748 vs state |
| Mean household income | $121,241 |
| Per-capita income | $48,196 |
| Poverty rate | 6.9%+0.6% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 62.5% |
Top Industries by Employment
The largest employment sector in Baltimore County is professional & business services, accounting for 27.1% of workers.
How residents commute
3.0%
Drive alone
1.9%
Carpool
71.4%
Public transit
14.2%
Work from home
28.3 min
Avg commute
Housing
$330,000$-67,700 vs state
Median home value
$1,566
Median rent
66.3%
Homeownership rate
350,296
Total housing units
94.2%
Occupied
5.8%
Vacant
33.7%
Renter-occupied
Social & access
94.5%
With health insurance
95.3%
With broadband internet
21.3%
Foreign-born
6.0%
Veterans (18+)
11.8%
With a disability
84.4%
Speak language other than English at home
Education
91.7%
High School+
41.4%
Bachelor's+
Largest cities in Maryland
Other counties in Maryland
Part of Maryland
Metro areas in Maryland
County rankings
Common questions about Baltimore County, MD
Frequently Asked Questions
Baltimore County, Maryland has a population of 849,586 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 3rd-largest county in Maryland. Population density is 1420 people per square mile.
The population of Baltimore County has grown 5.7% since 2010 (806,654 → 852,425), a +0.39% annualized rate.
The median household income in Baltimore County, Maryland is $90,904, with mean (average) household income of $121,241 and per-capita income of $48,196. 6.9% of residents live below the federal poverty level.
In Baltimore County, the largest racial and ethnic groups are White (54.1%), Black or African American (30.3%), Hispanic or Latino (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Baltimore County, Maryland is 39.5 years. Residents are 52.4% female and 47.6% male.
The median home value in Baltimore County is $330,000 and median monthly rent is $1,566. 66.3% of occupied housing units are owner-occupied. The county has 350,296 total housing units, 5.8% of which are vacant.
The largest employment sector in Baltimore County, Maryland is professional, scientific, and management services, employing 27.1% of workers. The unemployment rate is 3.3%.
Baltimore is among the largest cities associated with Baltimore County, Maryland, with a population of 577,193.
Baltimore County, MD Climate
Baltimore County, MD has an average annual temperature of 12.3°C (54°F) and receives about 1131 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.3°C
Avg Temp
1131
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 0° / 31° | 85 mm |
| February | 1° / 34° | 74 mm |
| March | 6° / 43° | 97 mm |
| April | 11° / 53° | 90 mm |
| May | 17° / 63° | 113 mm |
| June | 22° / 71° | 98 mm |
| July | 24° / 76° | 103 mm |
| August | 24° / 74° | 101 mm |
| September | 20° / 67° | 101 mm |
| October | 13° / 56° | 84 mm |
| November | 8° / 46° | 94 mm |
| December | 3° / 37° | 91 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 Baltimore County, MD
The most comfortable months to visit Baltimore County, MD are typically June, September 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 -5°C low). May is usually the wettest month.
Where to stay near Baltimore County
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Statewide data for Maryland
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.