- Anacostia Watershed Society
- Association for Preservation Technology International
- Bees (DC Beekeepers)
- Barracks Row Main Street
- Barney Circle
- Capitol Hill Business Improvement District
- Capitol Hill Community Foundation
- Capitol Hill Garden Club
- Capitol Hill Town Square
- Capitol Hill Village
- Casey Trees DC
- CHAMPS (Capitol Hill Association of Merchants & Professionals)
- CountyOffice.org (nationwide search tool)
- Cultural Tourism DC
- Eastern Market
- Eastern Market Community Advisory Committee
- Eastern Market Main Street
- Eastern Power Boat Club
- Historic Congressional Cemetery
- Historical Society of Washington
- National Building Museum
- National Trust for Historic Preservation
- Near Southeast Blog
- North Lincoln Park Neighborhood Association (NLPNA) – Buzz Newsletter
- The Old Naval Hospital
- Overbeck Capitol Hill History Project
- Rosedale Citizens’ Alliance
- Trees for Capitol Hill
- Trinidad Neighborhood Association
- Washington Historical Society
- Community News Publications
