| Setra NybySawmillSetra Trävaror AB | Sweden | - | Operating | 197 000 m3/y sawn timber |
| Setra SkinnskattebergSawmillSetra Trävaror AB | Sweden | - | Operating | 136 000 m3/y sawn timber |
| SevLesPil SyktyvkarSawmillOOO SevLesPil | Russia | Softwood | Operating | 200 000 m3/y sawn timber |
| Sexton Lumber BloomfieldSawmillSexton Lumber Co Limited | Canada | Softwood | Operating | 135 823 m3/y sawn timber |
| Sguario Madeiras sågverkSawmillSguario Madeiras | Brazil | Softwood | Operating | No data yet |
| Shuqualak LumberSawmillShuqualak Lumber Company | United States | Softwood | Operating | No data yet |
| 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 | No data yet |
| 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 | No data yet |
| 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 | No data yet |
| Sierra Pacific Shasta LakeSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sierra Pacific SheltonSawmillSierra Pacific Industries | United States | Softwood | Operating | No data yet |
| Sigurdson Forest Products (Williams Lake)SawmillSigurdson Forest Products Ltd. | Canada | Softwood | Operating | 122 241 m3/y sawn timber |
| Šilalės medienaSawmillUAB Šilalės mediena | Lithuania | Softwood | Operating | 200 000 m3/y sawn timber |
| Singisi Forest Products (Merensky) - Kokstad/Harding/Langeni, 3 millsSawmillSingisi Forest Products | South Africa | Softwood | Operating | No data yet |
| Skeena Sawmills (Terrace)SawmillROC Holdings Ltd. (Skeena Sawmills) | Canada | - | Closed 2023 | 168 081 m3/y sawn timber |
| Slaatto Sag og HøvleriSawmillSlaatto Sag og Høvleri AS | Norway | Softwood | Operating | No data yet |
| Småland TimberSawmillSmåland Timber AB | Sweden | - | Operating | 30 000 m3/y sawn timber |
| Södra Wood KindaSawmillSödra Wood | Sweden | - | Operating | 240 000 m3/y sawn timber |
| Södra Wood LångasjöSawmillSödra Wood | Sweden | - | 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 | - | Operating | No data yet |
| Södra Wood UnneforsSawmillSödra Wood | Sweden | Softwood | Operating | 120 000 m3/y sawn timber |
| Södra Wood VäröSawmillSödra Wood | Sweden | Softwood | Operating | 610 000 m3/y sawn timber |
| Sokol Timber Company (Sokol DOK)SawmillSokol Timber Company | Russia | Softwood | Operating | 489 000 m3/y sawn timber |
| Southeastern Timber ProductsSawmillSoutheastern Timber Products LLC | United States | Softwood | Operating | No data yet |
| Spačva VinkovciSawmillBjelin Spačva d.o.o. (f.d. Spačva d.d.) | Croatia | Hardwood | Operating | No data yet |
| Spearfish Forest ProductsSawmillSpearfish Forest Products | United States | Softwood | Operating | 169 779 m3/y sawn timber |
| Spray Lake Sawmills (Cochrane)SawmillSpray Lake Sawmills Ltd. | Canada | - | Operating | No data yet |
| Spruce Products Ltd Swan RiverSawmillSpruce Products Ltd | Canada | Softwood | Operating | 93 379 m3/y sawn timber |
| Srbijašume pilana RaškaSawmillJP Srbijašume | Serbia | - | Operating | 30 000 m3/y |
| Stelmet Zielona GoraSawmillStelmet S.A. | Poland | - | Operating | 325 000 m3/y sawn timberestimated from 650 000 m3/y log intake |
| Stenvalls Trä LövholmenSawmillStenvalls Trä AB | Sweden | Softwood | Operating | 150 000 m3/y sawn timber |
| Stenvalls Trä ÖrarnaSawmillStenvalls Trä AB | Sweden | Softwood | Operating | 65 000 m3/y sawn timber |
| Stenvalls Trä SeskaröSawmillStenvalls Trä AB | Sweden | - | Operating | No data yet |
| Stenvalls Trä SikforsSawmillStenvalls Trä AB | Sweden | Softwood | Operating | 170 000 m3/y sawn timber |
| Stimson Forest GroveSawmillStimson Lumber | United States | Softwood | Operating | 169 779 m3/y sawn timber |
| Stimson PlummerSawmillStimson Lumber | United States | - | Closed | No data yet |
| Stimson Priest RiverSawmillStimson Lumber | United States | Softwood | Operating | 229 202 m3/y sawn timber |
| Stimson St. MariesSawmillStimson Lumber | United States | Softwood | Operating | 152 801 m3/y sawn timber |
| Stora Enso AlytusSawmillStora Enso Lietuva UAB | Lithuania | Softwood | Operating | No data yet |
| Stora Enso Bad St. LeonhardSawmillStora Enso Wood Products GmbH | Austria | - | Operating | 292 500 m3/y sawn timberestimated from 585 000 m3/y log intake |