| Scierie St-MichelSawmillScierie St-Michel Inc. | Canada | Softwood | Operating | No data yet |
| Scierie Zahnd SA (Rueyres)SawmillScierie Zahnd S.A. | Switzerland | - | Operating | 85 000 m3/y sawn timberestimated from 170 000 m3/y log intake |
| Scieries des Gardes (Felletin)SawmillScieries des Gardes (SDG) | France | - | Operating | 50 000 m3/y sawn timber |
| Segezha Sawmills (Segezhsky LDK)SawmillSegezha Sawmills | Russia | Softwood | Closed 2022 | No data yet |
| Segheria Varesco FratelliSawmillSegheria Varesco Fratelli S.r.l. (Varesco Legno) | Italy | Mixed | Operating | No data yet |
| Šerif Grupa - pilana Malo Selo (Gorski kotar)SawmillŠerif export-import d.o.o. | Croatia | Mixed | Operating | 15 000 m3/y sawn timberestimated from 30 000 m3/y log intake |
| Serração Moderna de LamelasSawmillSerração Moderna de Lamelas Lda. | Portugal | Softwood | Operating | No data yet |
| Serradora Boix (Puig-reig)SawmillSerradora Boix S.L. | Spain | Softwood | Operating | 85 000 m3/y sawn timber |
| Serradora CampamàSawmillSerradora Campamà S.L. | Spain | Softwood | Operating | No data yet |
| Serradora CornellàSawmillSerradora Cornellà S.L. | Spain | Softwood | Operating | No data yet |
| Serradora Forestal de CatalunyaSawmillSerradora Forestal de Catalunya S.L.U. | Spain | - | Operating | No data yet |
| Serrerías GaroleraSawmillSerrerías Garolera S.L. | Spain | Softwood | Operating | No data yet |
| Setles sawmill (ex Stora Enso Impilahti)SawmillOOO Setles | Russia | Softwood | Operating | 165 000 m3/y sawn timber |
| Setnovo sawmill (ex Stora Enso Nebolchi)SawmillOOO Setnovo | Russia | Softwood | Operating | 180 000 m3/y sawn timber |
| Setra FärilaSawmillSetra Trävaror AB | Sweden | Softwood | Operating | 216 000 m3/y sawn timber |
| Setra HasselforsSawmillSetra Trävaror AB | Sweden | Softwood | Operating | 320 000 m3/y sawn timber |
| Setra HebySawmillSetra Trävaror AB | Sweden | Softwood | Operating | 276 000 m3/y sawn timber |
| Setra KastetSawmillSetra Trävaror AB | Sweden | Softwood | Operating | 270 000 m3/y sawn timber |
| Setra NybySawmillSetra Trävaror AB | Sweden | Softwood | Operating | 197 000 m3/y sawn timber |
| Setra SkinnskattebergSawmillSetra Trävaror AB | Sweden | Softwood | Operating | 249 000 m3/y sawn timber |
| SevLesPil SyktyvkarSawmillOOO SevLesPil | Russia | Softwood | Operating | 250 000 m3/y sawn timber |
| Sexton Lumber BloomfieldSawmillSexton Lumber Co Limited | Canada | Softwood | Operating | 136 000 m3/y sawn timber |
| Sguario Madeiras sågverkSawmillSguario Madeiras | Brazil | Softwood | Operating | No data yet |
| Shuqualak LumberSawmillShuqualak Lumber Company | United States | Softwood | Operating | 212 000 m3/y sawn timber |
| Siat Braun (Urmatt)SawmillSiat Braun | France | Softwood | Operating | 400 000 m3/y sawn timber |
| Sierra Forest Products Terra BellaSawmillSierra Forest Products | United States | Softwood | Operating | No data yet |
| Sierra Pacific (Seneca) EugeneSawmillSeneca Sawmill Company | United States | Softwood | Operating | 594 000 m3/y sawn timber |
| Sierra Pacific (Seneca) NotiSawmillSeneca Sawmill Company | United States | Softwood | Operating | No data yet |
| Sierra Pacific AberdeenSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific AndersonSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific BurlingtonSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific BurneySawmillSierra Pacific Industries | United States | Softwood | Operating | 441 000 m3/y sawn timber |
| Sierra Pacific CentraliaSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific Chinese CampSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific OrovilleSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific QuincySawmillSierra Pacific Industries | United States | Softwood | Operating | 458 000 m3/y sawn timber |
| Sierra Pacific Shasta LakeSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific SheltonSawmillSierra Pacific Industries | United States | Softwood | Operating | 849 000 m3/y sawn timber |
| Sigurdson Forest Products (Williams Lake)SawmillSigurdson Forest Products Ltd. | Canada | Softwood | Operating | 122 000 m3/y sawn timber |
| Šilalės medienaSawmillUAB Šilalės mediena | Lithuania | Softwood | Operating | 200 000 m3/y sawn timber |
| Similkameen Forest Products (Princeton)SawmillGorman Group | Canada | Softwood | Operating | 509 000 m3/y sawn timber |
| Skeena Sawmills (Terrace)SawmillROC Holdings Ltd. (Skeena Sawmills) | Canada | Softwood | Closed 2023 | 340 000 m3/y sawn timber |
| Slaatto Sag og HøvleriSawmillSlaatto Sag og Høvleri AS | Norway | Softwood | Operating | No data yet |
| Småland TimberSawmillSmåland Timber AB | Sweden | Softwood | Operating | 30 000 m3/y sawn timber |
| Smiltene Impex (Launkalnes pag.)SawmillSIA Smiltene Impex | Latvia | - | Operating | 80 000 m3/y sawn timber |
| Södra Wood KindaSawmillSödra Wood | Sweden | Softwood | Operating | 240 000 m3/y sawn timber |
| Södra Wood LångasjöSawmillSödra Wood | Sweden | Softwood | Operating | 360 000 m3/y sawn timber |
| Södra Wood MönsteråsSawmillSödra Wood | Sweden | Softwood | Operating | 450 000 m3/y sawn timber |
| Södra Wood OrreforsSawmillSödra Wood | Sweden | Softwood | Operating | No data yet |
| Södra Wood UnneforsSawmillSödra Wood | Sweden | Softwood | Operating | 120 000 m3/y sawn timber |