DELAWARE
- Bike Delaware
- Ride Share Delaware
- First State Velo Sport (Road racing club-DE/PA/MD)
In New Castle County:
- White Clay Bicycle Club
- Biking Blue Hens 1211 King St. – Wilmington, DE 19801 (302) 571-9924
- Delaware Trail Spinners 929 Nottingham Road – Newark, DE 19711 (302) 366-8089
- The Wheelmen (National organization dedicated to collecting, riding and promoting historical bicycles)
In Kent County:
- Diamond State Bicycle Club P.O. Box 1729 – Dover, DE 19903 (302) 697-6400
- Milford Bicycle Club 3 North Walnut Street – Milford, DE 19963 (302) 422-8030
- Downstate Delaware Striders & Riders
In Sussex County:
- Nanticoke Bicycle Association 400 Woodland Road – Seaford, DE 19973 (302) 629-1268
- Sussex Cyclists 28 Marshall Road – Rehoboth, DE 19971 (302) 227-3697; sussexcyclists@att.net
PENNSYLVANIA
- Bicycle Club of Philadelphia
- Brandywine Bicycle Club
- Delaware Valley Bicycle Club
- Lancaster Bicycle Club
- Suburban Cyclists Unlimited
- West Chester Cycling Club
- Pedal PA
- Bicycle Coalition of Greater Philadelphia