All Fishing Charters
- Six Yacht
- SixFourFishing Charters
- Size Matters Charters
- Skevos Fishing Trip Rhodes
- Skiff Guide
- Skiff Tales
- Skillet Sportfishing
- Skinnin' Fins Charters
- Skinny Dipn Charters
- Skinny D’s Fishing Adventures
- Skinny Fly Charters
- Skinny Water Guide Co.
- Skipjack Sportfishing
- Skipjack by Amberjack Sport Fishing
- Skipper Charters
- Skipper Dan - Navy Boat
- Skipper Prima Ventures
- Skipper's Suwannee Gulf Charters
- Skippers Charter Service (big boat)
- Skirtchaser Charters – 36’ Yellowfin
- Skookum Fishing Charters
- Skull Fishing
- Skunk Fishing
- Skylar Blue
- Skylar Hamilton Guide Service
- Skylar's Fish On Charters
- Skyway Seafaris with Capt. Russell
- Skyway Sportfishing
- Slab Seeker Fishing Guide Service
- Slab Slayer Guide Service
- Slack Tide Charters
- Slack Tide Fishing Charters
- Slack Tide Kayak Fishing
- Slackem Charters – 46' Post
- Slackem Charters – 52' Hatteras
- Slacktide Sportfishing
- Slacktyde Charters
- Slaughterhouse Fishing
- Slice O Life Charter and Cruise LLC
- Slice Of Life Charter Company – Dassen Island
- Slice Of Life Charter Company – Tuna Charters
- Slice o Life Charter and Cruise LLC
- Slick Calm Charters
- Slick Calm Charters
- Slick Charters
- Slick Fin Charters
- Slick Fin Charters
- Slick Water Adventures
- Slightly Obsessed Deep Sea – 29’ Cat
- Slightly Obsessed Fishing Charters
- Sligo Sportfishing
- Sligo Sportfishing – Sligo II
- Slime Time Fishing Charters
- Slipknot Charters
- Slipknot Steelhead Charters – River
- Slo Fly Fishing And Fly Tying
- Slo-Troll'n
- Slobby Joe Charters
- Slobby Joe Charters – Anna Maria
- Slobby Joe Charters – Clearwater
- Slobby Joe Charters – Ruskin
- Slobby Joe Charters – Tampa
- SlotBoys Charters
- Slots and Spots Fishing – Offshore & Inshore
- Sloveniafishing
- Smackdown Sportfishing
- Smackdown Sportfishing
- Small Craft Advisory - Green Bay
- Small Craft Advisory - Oconto
- Small Craft Advisory - Sugar Creek
- Small Craft Advisory Guide Service
- Small Craft Advisory Guide Service - Bayshore
- Small Craft Advisory Guide Service - Suamico
- Small Craft Advisory – Little Suamico
- Small Jawz guide service
- Small Wave Charters
- Smash Fishing Charters
- Smile On Board - Fishing Boat Trips
- Smiley’s Guide Service
- Smith Fishing Adventures LLC
- Smith's Guiding
- Smoke 'N' Reels Fishing Charters – 33'
- Smoke Show Sportfishing
- Smoke n’ Reel
- Smokin Reel Charters LLC
- Smokin Reels – Buzzards Bay (Captain Cliff)
- Smokin Reels – Buzzards Bay (Captain Stephen)
- Smokin Reels – Cape Cod (Captain Stephen)
- Smokin Reels – Cape Cod Bay (Captain Cliff)
- Smokin' Fish
- Smokin' Hooks II
- Smokin’ Hooks
- Smoky Mountain Fishing Company
- Smooth Dog Charters
- Smooth River Guiding Co.
- SnS Sportfishing / Spoonfeeder Charters
- Snap Decision Charters
- Snap Em Up Fishing
- Snap Fishing Ventures – Northland
- Snap Shot Charters