| Interfor Port AngelesSawmillInterfor US | United States | - | Operating | No data yet |
| Interfor PrestonSawmillInterfor U.S. | United States | - | Operating | No data yet |
| Interfor SwainsboroSawmillInterfor U.S. | United States | - | Operating | No data yet |
| Interfor ThomastonSawmillInterfor U.S. | United States | - | Operating | No data yet |
| Interfor Timmins (ex-EACOM)SawmillInterfor Corporation | Canada | Softwood | Operating | No data yet |
| Interfor Val-d'Or (ex-EACOM)SawmillInterfor Corporation | Canada | - | Closed | No data yet |
| Irving Forest Products Ashland (Nashville Plantation)SawmillIrving Forest Products | United States | Softwood | Operating | 220 713 m3/y sawn timber |
| Irving Forest Products DixfieldSawmillIrving Forest Products | United States | Softwood | Operating | 169 779 m3/y sawn timber |
| Irving MasardisSawmillIrving Forest Products | United States | Softwood | Operating | 195 246 m3/y sawn timber |
| Ishinomaki MillPulp millNippon Paper Industries Co., Ltd. | Japan | Softwood | Operating | 585 000 t/y pulp production |
| Isojoen SahaSawmillIsojoen Saha Oy | Finland | Softwood | Operating | 150 000 m3/y sawn timber |
| ITC Paperboards Division BhadrachalamPulp millITC Limited | India | Hardwood | Operating | 350 000 t/y pulp production |
| Iwakuni MillPulp millNippon Paper Industries Co., Ltd. | Japan | Softwood | Operating | 620 000 t/y pulp production |
| J.D. Irving ChipmanSawmillJ.D. Irving, Limited (Sawmills Division) | Canada | - | Operating | No data yet |
| J.D. Irving DeersdaleSawmillJ.D. Irving, Limited (Sawmills Division) | Canada | - | Closed 2011 | No data yet |
| J.D. Irving DoaktownSawmillJ.D. Irving, Limited (Sawmills Division) | Canada | Softwood | Operating | No data yet |
| J.D. Irving KedgwickSawmillJ.D. Irving, Limited (Sawmills Division) | Canada | - | Operating | No data yet |
| J.D. Irving PohénégamookSawmillJ.D. Irving, Limited | Canada | - | Operating | 175 000 m3/y sawn timberestimated from 350 000 m3/y log intake |
| J.D. Irving St. LeonardSawmillJ.D. Irving, Limited (Sawmills Division) | Canada | - | Operating | No data yet |
| J.D. Irving SussexSawmillJ.D. Irving, Limited (Sawmills Division) | Canada | Softwood | Operating | No data yet |
| J.H. Huscroft (Erickson/Creston)SawmillJ. H. Huscroft Ltd. | Canada | Softwood | Operating | 78 098 m3/y sawn timber |
| Jacareí MillPulp millSuzano S.A. | Brazil | Hardwood | Operating | 1 100 000 t/y pulp production |
| Jackson MillPulp millPackaging Corporation of America (PCA) | United States | Softwood | Operating | 400 000 t/y pulp production |
| James Brown & SonSawmillJames Brown & Son | United Kingdom | - | Operating | No data yet |
| James Jones & Sons AboyneSawmillJames Jones & Sons Ltd | United Kingdom | - | Operating | No data yet |
| James Jones & Sons Annan (ex Kerr Timber Products)SawmillJames Jones and Sons Limited | United Kingdom | - | Operating | No data yet |
| James Jones & Sons KirriemuirSawmillJames Jones and Sons Limited | United Kingdom | - | Operating | No data yet |
| James Jones & Sons LockerbieSawmillJames Jones & Sons Ltd | United Kingdom | - | Operating | 240 000 m3/y sawn timber |
| James Jones & Sons MosstodlochSawmillJames Jones and Sons Limited | United Kingdom | - | Operating | No data yet |
| Jämsänkoski MillPulp millUPM-Kymmene Oyj | Finland | Softwood | Operating | No data yet |
| Jasper LumberSawmillJasper Forest Products | United States | Softwood | Operating | No data yet |
| Javorice PteniSawmillJavorice a.s. | Czech Republic | Softwood | Operating | 171 500 m3/y sawn timberestimated from 343 000 m3/y log intake |
| JDI TruroSawmillJ.D. Irving, Limited | Canada | - | Operating | 120 000 m3/y sawn timber |
| Jeonju MillPulp millJeonju Paper Co., Ltd. | South Korea | - | Operating | 44 000 t/y pulp production |
| Jesup MillPulp millRayonier Advanced Materials Inc (RYAM) | United States | Mixed | Operating | 590 000 t/y pulp production |
| Jet-PuuSawmillJet-Puu Oy | Finland | Softwood | Operating | 40 000 m3/y sawn timber |
| JGA LinnerydSawmillJ.G. Anderssons Söner AB (JGA) | Sweden | Softwood | Operating | 250 000 m3/y |
| Johann Kirchhoff (Joki) FinnentropSawmillJohann Kirchhoff GmbH & Co. KG (Joki) | Germany | Softwood | Operating | 52 500 m3/y sawn timberestimated from 105 000 m3/y log intake |
| Johann Offner Holzindustrie WolfsbergSawmillJohann Offner Holzindustrie GmbH | Austria | Softwood | Operating | 350 000 m3/y sawn timberestimated from 700 000 m3/y log intake |
| Johann Pabst Holzindustrie ObdachSawmillJohann Pabst Holzindustrie GmbH | Austria | Softwood | Operating | 210 000 m3/y sawn timberestimated from 420 000 m3/y log intake |
| John Gordon & Son (Gordon Timber)SawmillJohn Gordon & Son Ltd | United Kingdom | Softwood | Operating | No data yet |
| Johnsonburg MillPulp millDomtar | United States | - | Operating | 312 000 t/y pulp production |
| Jordan Lumber Mt. GileadSawmillJordan Lumber & Supply | United States | Softwood | Operating | No data yet |
| Josef Baust Holzbetrieb EsloheSawmillJosef Baust Holzbetrieb | Germany | Softwood | Operating | 25 000 m3/y sawn timberestimated from 50 000 m3/y log intake |
| Josef Ziegler Ploessberg-SteinSawmillJosef Ziegler GmbH | Germany | Softwood | Operating | 125 000 m3/y sawn timberestimated from 250 000 m3/y log intake |
| Joutseno BCTMP MillPulp millMetsä Board Oyj | Finland | Mixed | Operating | 360 000 t/y pulp production |
| Joutseno MillPulp millMetsä Fibre Oy | Finland | Softwood | Operating | 690 000 t/y pulp production |
| JPJ-WoodSawmillJPJ-Wood Oy | Finland | Softwood | Operating | 200 000 m3/y sawn timber |
| Junckers (Køge)SawmillF. Junckers Industrier A/S | Denmark | Hardwood | Operating | No data yet |
| Junnikkala KalajokiSawmillJunnikkala Oy | Finland | - | Operating | 200 000 m3/y sawn timber |