Baltimore County, Maryland

Baltimore County population, land area and income

Baltimore County had 852,425 residents in the Census Vintage 2024 estimate, on 598.4 square miles of land. It ranks 3rd of 24 in Maryland by population and 3rd by land area. That works out to 1,424.6 people per square mile, 14.8 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Maryland has 111,399 residents, so Baltimore County is 7.7 times that size.

Its SAIPE 2023 median household income of $86,807 is in the top tenth among 3,143 counties with an estimate.

How Baltimore County's population changed since 2020

Baltimore County lost 913 residents between the July 2020 and July 2024 estimates, a drop of 0.1%. That ranks 21st of 24 in Maryland for growth. The median Maryland county changed by +2.1%, and the state as a whole by +1.4%.

Since the April 2020 estimates base, Baltimore County recorded 39,417 births and 38,975 deaths, a natural change of +442. Net international migration added +17,915 and net domestic migration, people moving to or from other US counties, came to -20,935. The largest single component was domestic migration, which removed 20,935 people.

Where Baltimore County is

The Census internal point of Baltimore County is at 39.443200, -76.616600. It sits in UTM zone 18N. The map shades Maryland's 24 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Baltimore County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Baltimore County

No incorporated place of 1,000 or more people has residents in Baltimore County. Its 852,425 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Baltimore County

The Census 2024 county adjacency file lists 7 neighbors for Baltimore County, including 1 across a state line. The most populous is Anne Arundel County, MD, with 602,350 residents. Distances run between Census internal points in a straight line.

• Anne Arundel County

  602,350 people

  31 mi S

• Baltimore city

  568,271 people

  10 mi S

• PA

  York County, PA

  471,240 people

  34 mi N

• Howard County

  339,668 people

  21 mi SW

• Harford County

  265,514 people

  18 mi ENE

• Carroll County

  177,108 people

  23 mi WNW

• Kent County

  19,557 people

  30 mi ESE

Distance to Annapolis and the nearest big city

Annapolis is 32.8 miles SSE of Baltimore County's internal point in a straight line. The nearest place of 100,000 or more is Baltimore, MD (population 568,271), 9.9 miles away.

Baltimore County FIPS code

The FIPS code of Baltimore County is 24005: state code 24 for Maryland plus county code 005. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $86,807.