Download Howard County, Maryland GIS parcel data - 111,208 parcels with owner names, site & mailing addresses, acreage, land use, and sale values. Instant delivery in Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. $100 per county.
Data freshness: Maryland Open Data real-property assessments monthly SDAT/MDP roll; records reflect data available as of the first day of the portal update month; last loaded into LandAI on 2026-05-22.
Every purchase includes all five export formats (Shapefile, FileGDB, GeoPackage, GeoJSON & CSV), standardized to the LandAI parcel schema with WGS84 (EPSG:4326) geometry. After checkout you choose which formats to generate and download them for 45 days.
Field completeness measured across 111,208 active parcels (Maryland Open Data real-property assessments monthly SDAT/MDP roll; records reflect data available as of the first day of the portal update month; last loaded into LandAI on 2026-05-22):
| Field | Coverage |
|---|---|
| Owner names | 99.1% |
| Site addresses | 99.2% |
| Owner mailing addresses | 99.0% |
| Deeded acres | 99.0% |
| Calculated (GIS) acres | 100% |
These are 5 of the 48 standardized fields in the LandAI parcel schema. Live per-field completeness for every field is shown on this page's interactive view.
Howard County, Maryland has 111,208 active parcels in the LandAI dataset (source data as of 2026-05-01).
Every parcel includes the standardized LandAI schema: parcel ID and geometry plus owner names (99.1%), site addresses (99.2%), owner mailing addresses (99.0%), deeded acres (99.0%), calculated (GIS) acres (100%), and more.
Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. Every $100 county purchase includes all five formats; you choose which to generate after checkout and can re-download for 45 days.
Maryland Open Data real-property assessments monthly SDAT/MDP roll; records reflect data available as of the first day of the portal update month; last loaded into LandAI on 2026-05-22.
Yes - 99.1% of Howard County parcels include a normalized owner name, along with owner mailing addresses where the county provides them.
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