Berkeley Paddle and Rowing Club—(BPRC) is located in Berkeley at the Aquatic Park. Activities include rowing and paddling clinics and events. While most club members row and paddle recreationally for fitness, several train for, and compete in, masters events.
Petaluma Paddlers—A community of paddle sport enthusiasts in the Petaluma area dedicated to fun and safety on the water.
Sacramento Sea Kayakers—Located in Sacramento and has beginners to very experienced paddlers. They paddle local lakes, rivers and the Pacific from calm protected water to the open coast of northern and central CA.
Bore Riders—The official home of tidal bore surfing in the UK.
California Floaters Society—(CFS) is a paddling club in Northern California for all types of river craft, including kayaks, rafts, catarafts, canoes, river boards, and whatever else may come along.
California Kayak Friends—(CKF) is a club for paddlesport enthusiasts located in southern California. Most of their activities involve sea kayaking, but river runners and canoeists are welcome to join in the fun.
Chicago Area Sea Kayakers Association—Has promoted sea kayaking in the Chicago area for over twenty years. CASKA welcomes paddlers of all experience levels and promotes save paddling practices.
Columbus Area Kayak Association—A loose association of kayakers in central Ohio with a primary interest in flat water paddling in regional rivers, streams, creeks, estuaries, reservoirs, lakes and ponds.
Explore North Coast—An association of paddlers in Humboldt County that holds regular paddling events, promotes paddling safety and education, and encourages stewardship of, and improvement to, bay and coastal access on the California North Coast.
Oregon Ocean Paddlers Society—OOPS! is the acronym of the Portland paddling club, a large and active club with a good emphasis on safety, proper gear and skills development and engaged in a rich variety of sea kayak activities at all levels.
Qajaq USA—(or "Qaannat Kattuffiat" if you prefer) has an excellent web site with loads of information on Greenland-style kayaking.