| Commonwealth of Massachusetts | Massachusetts | Government Agency | General Preservation |
| Massachusetts Historical Commission | Massachusetts | Government Agency | General Preservation |
| Department of Environmental Management | Massachusetts | Government Agency | General Preservation |
| Boston Preservation Alliance | Massachusetts | Non-Profit | General Preservation |
| The Bostonian Society | Massachusetts | Non-Profit | General Preservation |
| Community Preservation Coalition | Massachusetts | Non-Profit | General Preservation |
| Historic Boston, Inc. | Massachusetts | Non-Profit | General Preservation |
| Historic Salem, Inc. | Massachusetts | Non-Profit | General Preservation |
| Lowell Parks & Conservation Trust, Inc. | Massachusetts | Non-Profit | General Preservation |
| WHALE (New Bedford) | Massachusetts | Non-Profit | General Preservation |
| Preservation Worcester | Massachusetts | Non-Profit | General Preservation |
| Historic New England | Massachusetts | Non-Profit | General Preservation |
| Trustees of Reservations | Massachusetts | Non-Profit | General Preservation |
| The Esplanade Association | Massachusetts | Non-Profit | General Preservation |
| National Alliance of Preservation Commissions | National | Non-Profit | General Preservation |
| National Park Service | National | Government Agency | General Preservation |
| National Trust for Historic Preservation | National | Non-Profit | General Preservation |
| Preservation Action | National | Non-Profit | General Preservation |
| Trust for Public Land | National | Non-Profit | General Preservation |
| American Farmland Trust | National | Non-Profit | Barn Preservation |
| Barn Again! | National | Non-Profit | Barn Preservation |
| Barn Journal | National | Non-Profit | Barn Preservation |
| Dutch Barn Preservation Society | National | Non-Profit | Barn Preservation |
| Historic Homeworks | National | Non-Profit | Barn Preservation |
| National Park Service, Technical Preservation Services | National | Non-Profit | Barn Preservation |
| Timber Framers Guild of North America | National | Non-Profit | Barn Preservation |
| Arizona Preservation Foundation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| California Preservation Foundation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Colorado Preservation, Inc. | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Connecticut Trust for Historic Preservation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| D.C. Preservation League | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Delaware, Inc. | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Florida Trust for Historic Preservation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| The Georgia Trust | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Historic Hawaii Foundation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Idaho | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Landmarks Preservation Council of Illinois | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Historic Landmarks Foundation of Indiana | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Iowa Historic Preservation Alliance | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Kansas Preservation Alliance | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Kentucky | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Louisiana Preservation Alliance | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Maine Preservation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Maryland | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Michigan Historic Preservation Network | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Alliance of Minnesota | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Missouri Alliance for Historic Preservation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Montana Preservation Alliance | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| New Hampshire Preservation Alliance | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation New Jersey, Inc. | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| New Mexico Heritage Preservation Alliance | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation League of New York State | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation North Carolina | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation North Dakota | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Heritage Ohio/Downtown Ohio, Inc. | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Oklahoma, Inc. | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Historic Preservation League of Oregon | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Pennsylvania | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preserve Rhode Island | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preserve South Dakota | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Tennessee Preservation Trust | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Texas | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Utah Heritage Foundation | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Trust of Vermont | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Association for the Preservation of Virginia Antiquities | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Alliance of Virginia | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Preservation Alliance of West Virginia | State (non-MA) | Non-Profit | Statewide Preservation (non-MA) |
| Partners for Sacred Places | | | Historic Religious Property Preservation |
| NTHP, Neighborhood Schools Issue | National | Non-Profit | Historic School Property Preservation |
| NTHP, Help Johnny Walk to School Project | National | Non-Profit | Historic School Property Preservation |
