- Ford Vehicles
- Greater Baltimore Model A Ford Club
- Model T Ford Club of America – Blue and Grey Chapter
- Early Ford V8 Club of America – National Capitol Region
- Mustang Club of Maryland
- Mid-Maryland Ford Club
- International Thunderbird Club – Mid-Atlantic Thunderbird Club
- Thunderbird Club International – Potomac Classic Thunderbird Club
- DeSoto Vehicles
- DeSoto Club of Maryland
- Mercury Vehicles
- Delmarva Cougar Club
- Studebaker Vehicles
- Studebaker Drivers Club – Potomac Chapter
- Studebaker Drivers Club – Keystone Region
- Chevrolet Vehicles
- Vintage Chevrolet Club of America – Free State Region
- Maryland Chevelle Club
- Maryland Camaro Club
- Delaware Valley Camaro Club
- Corvette Club of America
- Heart of Maryland Classic Chevy Club
- Corvette Annapolis
- Baltimore County Corvette Club
- National Corvette Restorers Society – Mason-Dixon Chapter
- Pontiac & Oakland Vehicles
- Pontiac-Oakland Club International – Early Times Chapter
- Pontiac-Oakland Club International – Keystone State Chapter
- GTO Association America – Susquehanna Valley GTO Chapter
- GTO Association of America – Royal GTO Chapter
- Mid-Atlantic Fiero Owners Association
- Oldsmobile & REO Vehicles
- Oldsmobile Club of America – Blue-Grey Chapter
- Buick Vehicles
- Buick Owners of Maryland (BOOM)
- Cadillac & LaSalle Vehicles
- Cadillac & LaSalle Club – Potomac Region
- Americal Motors Corporation Vehicles
- Potomac Ramblers
- Packard Vehicles
- Mid-Atlantic Packards
- Other American Brand Vehicles
- Hudson-Essex-Terraplane Club – Chesapeake Bay Chapter
- European Vehicles
- Ferrari Club of America – Mid-Atlantic Region
- Multi-Make Car Clubs
- Antique Automobile Club of America – Chesapeake Region
- Classic Car Club of America – Chesapeake Region
- Antique Motor Club of Greater Baltimore
- Chesapeake Classic Car Club – Easton, Maryland