- Adam Smith Equestrian Center (Broadneck Park)
- Arnold Park
- B&A Trail Park
- Bay Hills Swim Club
- Broadneck Youth Sports
- Broadneck Park
- Broadneck Bruins Football
- Cape St. Claire Recreation Council
- Chase Creek Pool
- Ferry Point Marina
- Magothy Marina
- Magothy River Sailing Association
- Sandy Point State Park
- Yacht Club of Cape Saint Claire
- Anne Arundel Waterway Restoration Alliance
- Arnold Conservation Team
Ashcroft Community Association (APC Member) - Broadneck Council of Communities (APC Member)
- Broadneck Federation
- Community Foundation of Anne Arundel County
- Community of Cape St. Claire
- Friends of Anne Arundel Trails
- Friends of Broadneck Park
- Goshen Farm Preservation Society
- Greater Severna Park Council (APC Member)
- Greater Severna Park Watershed Action Group
- Growth Action Network
- Magothy River Association
- Pines on the Severn Improvement Association (APC Member)
- Preserve Annapolis Roads
- Preservation Maryland
- Save Mill Creek
- Save Spriggs Farm
- Scenic Maryland
- Severn River Association
- Severn Riverkeeper
- Sierra Club - Anne Arundel Group
- Admiral's Walk
- Amberley
- Arnold Village
- Ashcroft (APC Member)
- Barksdale
- Bay Dale
- Bay Hills (APC Member)
- Bayberry
- Baystone Court
- Belle Pointe
- Belvedere Heights
- Bluffs at Deep Creek
- Briar Cliff on the Severn
- Briarlea
- Briarwood
- Briteleaf on the Magothy
- Campus Green
- Candle Ridge
- Cape Saint Claire
- Capetown (APC Member)
- Capri Estates
- College Manor (APC Member)
- College Parkway Place
- Colonial Manor
- Courts at Belle Pointe
- Cresston Park
- Crystal Beach
- Deep Creek Commons
- Deep Creek Village
- Divinity Cove (APC Member)
- Dorado Hills
- Dreams Landing
- Falcon Crest
- Four Seasons at St. Margarets
- Foxmoor
- Glen Oban (APC Member)
- Harting Farm
- Henekes Corner
- Hidden Ridge
- Holly Anna Acres
- Hunter's Pointe
- Indian Hills & Glen Eden (APC Member)
- Jamestown on the Magothy
- Kimberly Woods Village
- Landhaven
- Longview
- Mago Vista Area Civic Association, Inc.
- Magothy Manor
- Magothy Meadows
- Martins Cove Farm
- Moorings on the Magothy
- Morgan's Purchase
- North Point
- Oakland Hill
- Oakmont
- Orchard Knolls
- Pine Valley
- Pines on the Severn (APC Member)
- Podickery Point
- Point-O-Woods
- Raintree (APC Member)
- Rosslare
- Revell Downs
- Rugby Hall
- Saint Margaret
- Schoolers Pond
- Shore Acres (APC Member)
- Sillman Estates
- Spriggs Cove
- Stone Crest
- Stonington (APC Member)
- Tanglewood (APC Member)
- Tanglewood II
- Terrace Gardens
- Twin Harbors (APC Member)
- Ulmstead Acres
- Ulmstead Cove
- Ulmstead Estates
- Ulmstead Gardens
- Ulmstead Point
- Walnut Ridge
- Walnut View
- Weatherly
- Whispering Woods
- Winchester-on-the-Severn (APC Member)
- Windsor
- Woodfield