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 273,663 mapped parcels covering 353,226 acres. The median assessed value is $294,900. The median lot size is 0.18 acres. 5,161 parcels are 10 acres or larger. Residential accounts for 87.6% of parcels. Exempt follows at 4.4% and commercial at 2.7%. Of the parcels with a recorded build year, half were built in 1962 or earlier. The records carry 225,493 distinct owner names. About 3% 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 91.6%. 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 849,586 residents in 2020. Recent census data shows how the county has changed over time. Long-term census counts show how the county has changed across recent decades. Hampstead is the largest city in the county, with about 6,241 residents. Some of the county's most populated postal areas include Parkville, Owings Mills and Dundalk.

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 44 zip codes. Some of the county's most populated zip codes include Parkville (21234), Owings Mills (21117) and Dundalk (21222). The largest zip areas account for a meaningful share of the county population. Together, the three largest zips account for about 0% 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 39.5, which is close to the Maryland average. About 21.9% of residents are under 18, while 17.8% 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 31.8% of the population, which points to a solid working-age base. About 41.4% 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 110,024 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, based on district totals from 2017 to 2024.

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 $330,000 and a median gross rent of $1,566. About 66% 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 $382,473 and homes spent about 33 days on the market.

Businesses in Baltimore County, MD

Baltimore County has 30,414 business listings across 1,119 categories. The largest categories in Baltimore County business listings are Churches & Religious Organizations (704, 2.3%), Real Estate Agents (547, 1.8%), and Insurance Agencies (469, 1.5%). 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.