Gunpowder Valley Conservancy
Service Area
- Northern Baltimore County, Carroll County, Harford County, and York County, primarily in the Gunpowder Watershed
- Sponsors the Gunpowder Valley and Coastal Rural Legacy Areas
Land Preservation Trust
Service Area
- Northwestern Baltimore County
- Sponsors the Piney Run Rural Legacy Area
Website
Long Green Land Trust
Service Area
- Northeastern Baltimore County, primarily in the Long Green Valley
- Sponsors the Long Green Rural Legacy Area
Website
Manor Conservancy
Service Area
- Northern Baltimore County and Harford County
- Sponsors the Manor Rural Legacy Area
Website
NeighborSpace of Baltimore County
Service Area
- Urban Baltimore County