| Riau Andalan Pulp & PaperPulp millAPRIL | Indonesia | Hardwood | Operating | 4 000 000 t/y pulp |
| Ribas do Rio Pardo MillPulp millSuzano S.A. | Brazil | Hardwood | Operating | 2 550 000 t/y pulp |
| Riegelwood MillPulp millGlobal Cellulose Fibers | United States | Softwood | Operating | 500 000 t/y pulp |
| Riverdale MillPulp millInternational Paper | United States | Mixed | Operating | 700 000 t/y pulp |
| Roanoke Rapids MillPulp millSmurfit Westrock | United States | Softwood | Operating | 505 000 t/y pulp |
| Rockhammar MillPulp millBillerud AB (publ) | Sweden | - | Operating | 150 000 t/y pulp |
| Rosenthal MillPulp millMercer International Inc. | Germany | Softwood | Operating | 360 000 t/y pulp |
| Rumford MillPulp millND Paper (Nine Dragons Paper Holdings Limited subsidiary) | United States | Mixed | Operating | No data yet |
| Ružomberok MillPulp millMondi Group | Slovakia | Mixed | Operating | 666 000 t/y pulp |
| Saiccor MillPulp millSappi Limited | South Africa | Hardwood | Operating | 890 000 t/y pulp |
| Saillat MillPulp millSylvamo Corporation | France | Mixed | Operating | 395 000 t/y pulp |
| Saint John MillPulp millJD Irving Ltd | Canada | Mixed | Operating | 365 000 t/y pulp |
| Saint-Félicien MillPulp millPaper Excellence (Domtar division; formerly Resolute) | Canada | Softwood | Operating | 357 000 t/y pulp |
| Sanguesa MillPulp millSmurfit Kappa Navarra, S.A. | Spain | Softwood | Operating | No data yet |
| Santa Fe MillPulp millCMPC Celulosa S.A. | Chile | Hardwood | Operating | 1 300 000 t/y pulp |
| Satsumasendai MillPulp millChuetsu Pulp & Paper Co., Ltd. | Japan | Hardwood | Operating | 180 000 t/y pulp |
| Segezha MillPulp millSegezha Group | Russia | Softwood | Operating | 414 000 t/y pulp |
| Seshasayee Paper (SPB)Pulp millSeshasayee Paper and Boards Limited | India | Hardwood | Operating | 154 000 t/y pulp |
| Shouguang MillPulp millShandong Chenming Paper Holdings | China | - | Operating | 1 000 000 t/y pulp |
| Sirpur Paper MillsPulp millJK Paper Limited | India | Hardwood | Operating | No data yet |
| Skärblacka MillPulp millBillerud AB (publ) | Sweden | Mixed | Operating | No data yet |
| Skoghall MillPulp millStora Enso | Sweden | Mixed | Operating | 700 000 t/y pulp |
| Skookumchuck MillPulp millPaper Excellence | Canada | Softwood | Operating | 270 000 t/y pulp |
| Skutskär MillPulp millStora Enso | Sweden | Mixed | Operating | 515 000 t/y pulp |
| Smurfit Nervion Iurreta MillPulp millSmurfit Westrock Nervion, S.A. | Spain | Softwood | Operating | 152 000 t/y pulp |
| Somerset MillPulp millSappi Limited | United States | Softwood | Operating | 525 000 t/y pulp |
| Springfield MillPulp millInternational Paper | United States | Softwood | Operating | No data yet |
| Stendal MillPulp millMercer International Inc. | Germany | Softwood | Operating | 740 000 t/y pulp |
| Štětí MillPulp millMondi Group | Czech Republic | Mixed | Operating | 750 000 t/y pulp |
| Stora Enso Ostroleka MillPulp millStora Enso Poland S.A. | Poland | Softwood | Operating | No data yet |
| Suzano MillPulp millSuzano S.A. | Brazil | Hardwood | Operating | 620 000 t/y pulp |
| Świecie MillPulp millMondi Group | Poland | Softwood | Operating | 500 000 t/y pulp |
| Syassky MillPulp millSyassky | Russia | Softwood | Operating | No data yet |
| Tamil Nadu Newsprint (TNPL)Pulp millTamil Nadu Newsprint and Papers Limited | India | Hardwood | Operating | No data yet |
| Ticonderoga MillPulp millSylvamo Corporation | United States | Mixed | Operating | No data yet |
| Tomioka MillPulp millOji Paper Co., Ltd. | Japan | - | Operating | 520 000 t/y pulp |
| Tres Barras MillPulp millSmurfit Westrock Brasil | Brazil | Mixed | Operating | No data yet |
| Três LagoasPulp millEldorado Brasil | Brazil | Hardwood | Operating | 1 800 000 t/y pulp |
| Três Lagoas MillPulp millSuzano S.A. | Brazil | Hardwood | Operating | 3 250 000 t/y pulp |
| Tugela MillPulp millSappi Limited | South Africa | Softwood | Operating | 170 000 t/y pulp |
| Tumut Kraft MillPulp millVisy | Australia | Softwood | Operating | 700 000 t/y pulp |
| UPM Paso de los Toros Pulp MillPulp millUPM | Uruguay | Hardwood | Operating | 2 100 000 t/y pulp |
| Ust-IlimskPulp millIlim Group | Russia | Softwood | Operating | 908 000 t/y pulp |
| Valdivia MillPulp millArauco | Chile | Mixed | Operating | 550 000 t/y pulp |
| Valliant MillPulp millInternational Paper | United States | Softwood | Operating | No data yet |
| Vallvik MillPulp millRottneros AB | Sweden | Softwood | Operating | 240 000 t/y pulp |
| Varkaus MillPulp millStora Enso | Finland | Softwood | Operating | 310 000 t/y pulp |
| Värö MillPulp millSödra | Sweden | Softwood | Operating | 780 000 t/y pulp |
| Veracel MillPulp millSuzano S.A. (50%) / Stora Enso (50%) | Brazil | Hardwood | Operating | 1 100 000 t/y pulp |
| Viana MillPulp millDS Smith Paper Viana, S.A. | Portugal | Hardwood | Operating | No data yet |