Brands
- S Klein
- S M
- S. M. Z.
- S.W. Cut
- SA
- SAB
- Sabatier
- Saber Knives
- Sabre
- Sack-Ups
- Sacks-Ups
- SAKAI TAKAYUKI
- Sakon Shiraume
- Sam McDowell
- Samuel Wragg
- San Francisco Gun Exchange
- Santa Fe Stoneworks
- Sarco
- Satake
- SBO
- Scale Mead
- ScaleMead
- Schade
- Schatt & Morgan
- Schatt & Morgan Cutlery Co.
- Schlieper
- Schrade
- Schrade Avatar
- Schrade Cliphanger
- Schrade Ducks Unlimited
- Schrade Imperial
- Schrade Nighthawk
- Schrade Old Timer
- Schrade Outback
- Schrade Simon
- Schrade Uncle Henry
- Schrade Walden
- Schrade X-Timer
- Schrade+
- Scoop
- Scrapyard
- ScrewSaver
- Sea Buoy
- Sea-Buoy
- Sears
- SeberTool
- SEIZO IMAI
- Seki
- SEKI Cut
- Seki Japan
- Servistar
- Seto
- Shadow Tech
- Sharp
- Sharpening Rod
- Sheath
- Sheaths
- Sheffield
- Shelham
- Shergrip
- Shibazi
- Shimano
- Shoceram 21
- Shrade
- Shrade-Walden
- Shun
- Shure Edge
- Sid Latham
- Silky
- Silver Knight
- Silver Stag
- SK
- Skachet
- Skoz
- Slysteel
- Smith & Wesson
- Smith and Wesson
- Smoky Mountain
- Snap On
- Snap-on
- SNP
- Soffe
- SOG
- Solar
- Solingen
- SOS
- Spalding
- Spokane Leather
- Spouting Whale
- Springfield
- Spyderco
- SS-Cut
- Stainless Japan
- Stainless Supreme
- Standing Stone Cutlery
- Stanley Rogers
- Star
- Steer
- Steve Jernigan
- Stidhams Knives