Baltimore County GIS Maps

Baltimore County Maps

The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.

County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.

Baltimore County Parcels

Baltimore County has 222,880 mapped parcels covering 40,951 acres. The median assessed value is $149,800. The median lot size is 0.04 acres. 452 parcels are 10 acres or larger. Residential accounts for 85.9% of parcels. Exempt follows at 5.9% and commercial at 3.8%. Of the parcels with a recorded build year, half were built in 1925 or earlier. The records carry 167,305 distinct owner names. About 7% of parcels list an owner mailing address outside Maryland. Owner names, mailing addresses, assessed values and lot sizes are on nearly every parcel. Site addresses reach 97.1%. Browse the interactive Baltimore County Parcel viewer here.

Baltimore County Parcel Data Coverage

Field coverage measured across all Baltimore County parcel records. Download free sample data here.

Baltimore County Population

Baltimore County had 854,535 residents in 2020. That was 6.2% higher than in 2010. Baltimore County added 100,243 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 10,557 people per square mile. Some of the county's most populated postal areas include Baltimore, Baltimore and Baltimore.

Population Trend in Baltimore County MD

Baltimore County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Baltimore County Zip Codes

Baltimore County has 23 zip codes. Some of the county's most populated zip codes include Baltimore (21224), Baltimore (21215) and Baltimore (21206). Baltimore is the largest zip by population, with about 54,266 residents or 6% of the county total. Together, the three largest zips account for about 18% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Baltimore County MD

Baltimore County Zip Code populations and trends per most recent census data.

Baltimore County Demographics

Baltimore County has a median age of 36.1, which makes the county a little younger than Maryland overall. About 20.9% of residents are under 18, while 14.9% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 37.1% of the population, which points to a solid working-age base. About 35.4% of adults have a bachelor's degree or higher, above the statewide figure of 42.7%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Baltimore County MD

Baltimore County School Districts

Baltimore County is served by 1 public school district with 76,807 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.

Largest School Districts by Enrollment in Baltimore County MD

Baltimore County school district enrollment and trends per most recent NCES reporting data.

Baltimore County Housing & Real Estate

Baltimore County has a median home value of $219,300 and a median gross rent of $1,290. About 48% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Maryland median, while rents come in below the state average. In March 2026, the median listing price was $199,450 and homes spent about 51 days on the market.

Businesses in Baltimore County, MD

Baltimore County has 22,775 business listings across 1,030 categories. The largest categories in Baltimore County business listings are Churches & Religious Organizations (896, 3.9%), Community & Nonprofits (527, 2.3%), and Landmark And Historical Building (512, 2.2%). The full Baltimore County business listings dataset includes names, categories, addresses and contact details where available. Baltimore County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Baltimore County, MD

Baltimore County Business Listings

Baltimore County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Baltimore County Basemaps

Baltimore County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Maryland — explore the full structure before you buy.