Production Companies
- New Line Cinema (presents)
- WingNut Films (as A Wingnut Films production)
- The Saul Zaentz Company (licensor) (d/b/a Tolkien Enterprises)
Distributors
- New Line Cinema (2003) (USA) (theatrical)
- A-Film Distribution (2003) (Netherlands) (theatrical)
- Alliance Atlantis Communications (2003) (Canada) (theatrical)
- Cinergia (2004) (Ukraine) (theatrical)
- Deltamac Co. (2002) (Hong Kong) (theatrical)
- Entertainment Film Distributors (2003) (UK) (theatrical)
- Entertainment One (2003) (Spain) (theatrical)
- FS Film (2003) (Finland) (theatrical)
- Fox-Warner (2003) (Switzerland) (theatrical)
- Herald Film Company (2004) (Japan) (theatrical)
- Karo Premiere (2004) (Russia) (theatrical)
- Medusa Distribuzione (2003) (Italy) (theatrical)
- Metropolitan Filmexport (2003) (France) (theatrical)
- Roadshow Films (2003) (Australia) (theatrical)
- Svensk Filmindustri (SF) (2003) (Sweden) (theatrical)
- Village Roadshow Entertainment (2003) (Australia) (theatrical)
- Warner Bros Pictures (2004) (India) (theatrical)
- Warner Bros. Pictures (2004) (Argentina) (theatrical)
- Warner Bros. (2003) (Brazil) (theatrical)
- Warner Bros. (2003) (Germany) (theatrical)
- Warner Bros. (2020) (Netherlands) (theatrical) (re-release) (extended version)
- A-Film Distribution (2011) (Netherlands) (Blu-ray) (DVD) (15-disc The Lord of the Rings: The Motion Picture Trilogy Extended Edition)
- A-Film Home Entertainment (2004) (Netherlands) (DVD) (VHS)
- A-Film Home Entertainment (2010) (Netherlands) (Blu-ray)
- Alliance Atlantis Home Video (2004) (Canada) (DVD)
- Alliance Atlantis Home Video (2004) (Canada) (VHS)
- Argentina Video Home (2004) (Argentina) (DVD) (2 disc)
- Argentina Video Home (2004) (Argentina) (VHS)
- Argentina Video Home (2005) (Argentina) (DVD) (1 disc)
- Deltamac Co. (2002) (Hong Kong) (DVD)
- Entertainment in Video (2004) (UK) (DVD)
- Entertainment in Video (2004) (UK) (VHS)
- Entertainment in Video (2010) (UK) (Blu-ray)
- FS Film (2004) (Finland) (DVD) (VHS)
- FS Film (2011) (Finland) (Blu-ray) (DVD) (15-disc edition)
- HBO Max (2020) (USA) (video) (VOD)
- Katholieke Radio Omroep (KRO) (2006) (Netherlands) (TV)
- MGM Worldwide Television (2006) (USA) (TV) (syndication) (for New Line Television)
- Myndform (2003) (Iceland) (all media)
- Nelonen (2006) (Finland) (TV)
- Netflix (2013) (Norway) (video) (VOD)
- Netflix (Chile) (video) (Internet only - Netflix)
- New Line Home Entertainment (2004) (USA) (DVD)
- New Line Home Entertainment (2010) (USA) (Blu-ray)
- New Line Home Video (2004) (USA) (VHS)
- New Line Home Video (2010) (USA) (Blu-ray)
- Pony Canyon (2004) (Japan) (DVD)
- Rainboworld Entertainment (2003) (Taiwan) (all media)
- Roadshow Entertainment Video (2003) (Australia) (VHS)
- Roadshow Entertainment (2003) (Australia) (DVD)
- SF Norge A/S (2003-) (Norway) (all media)
- Sony Pictures Home Entertainment (2004) (Spain) (DVD)
- Sony Pictures Home Entertainment (2004) (Spain) (DVD) (trilogy edition)
- Turner Classic Movies (TCM) (2015) (USA) (TV)
- Warner Bros. Home Entertainment (2020) (USA) (all media) (Ultra HD Blu-ray) (The Lord of the Rings: The Motion Picture Trilogy)
- Warner Home Video (2004) (Germany) (VHS)
- Warner Home Video (2010) (USA) (Blu-ray)
- Warner Home Video (2011) (USA) (Blu-ray) (DVD) (15-disc The Lord of the Rings: The Motion Picture Trilogy Extended Edition)
- Warner Home Video (2016) (USA) (Blu-ray) (Middle-Earth Ultimate Collector's Edition Box Set)
- Warner Home Vídeo (2004) (Brazil) (VHS)
Special Effects
- Weta Workshop (special makeup, creatures, armour, weapons and miniatures)
- Weta Digital (digital visual effects)
- Tweak Films (visual effects)
- Oktobor (visual effects)
- Sandbox F/X (visual effects)
- Rhythm & Hues Studios (visual effects) (as Rhythm and Hues)
- Rising Sun Pictures (visual effects)
- Gentle Giant Studios
- Hybrid Enterprises (uncredited)
- Motion Works (motion capture) (uncredited)
- XYZ-RGB (scanning services)
Other Companies
- AFM Lighting (lighting equipment supplied by)
- AON/Albert G. Ruben Insurance Services (additional insurance) (as AON/Alber G. Ruben)
- ARRI (camera and lenses by)
- Abbey Road Studios (music recorded at)
- Air Lyndhurst Studios (music recorded at)
- Anvil Post Production (adr facility)
- Background Talent (extras casting)
- Camperdown Studios (adr facility)
- Chapman/Leonard Studio Equipment (cranes and dollies) (uncredited)
- Colorfront (digital film grading system)
- Colosseum, Watford (music recorded at) (as CTS Colosseum, Watford)
- Company Wide Shut (titles)
- Creative Regie (location services)
- Department of Conservation Te Papa Atawhai (personal thanks)
- Dolby Laboratories (sound post-production)
- EFilm (personal thanks) (as E-Film)
- Eggplant Picture & Sound (digital colour grading) (as Optix Digital Pictures)
- Flying Trestles (catering)
- Giant Studios (motion capture technology provided by)
- Imagica (scanned on)
- International Film Guarantors (completion guarantee)
- KAM Models and Talent (extras casting)
- London Philharmonic Orchestra (music performed by) (as The London Philharmonic Orchestra)
- London Voices (music performed by) (as The London Voices)
- Mahony & Company (insurance services)
- Mi Casa Multimedia (DVD/Blu-ray audio mastering 5.1, 6.1)
- Motion Picture Association of America (MPAA) (approval certificate) (no. 40415)
- Motion Picture Association of America (MPAA) (approval certificate) (no. 40726) (special extended edition)
- New Zealand Force Te Ope Kaatua O Aotearoa (I) (personal thanks)
- Optix Digital Pictures (digital color grading)
- Pacific Title (titles)
- Packair Airfreight (international logistics)
- Park Road Post Production (re-recording facility)
- Redline Sound Studios (foley recording)
- Renderman (rendered with) (as Pixar's Renderman)
- Reprise Records (soundtrack available on)
- Skywalker Sound (post-production sound services) (uncredited)
- Spacecam Systems (Spacecam aerial camera system provided by)
- Stone Street Studios (Sound stages)
- The Film Unit, Wellington (color and telecine dailies) (as The Film Unit Ltd.)
- The London Oratory School Schola (music performed by)
- Three Foot Six (production service: New Zealand) (uncredited)
- Upper Deck Film Services (negative cutting)
- WMG Soundtracks (soundtrack available on)
- Warner Music Group (soundtrack published by) (uncredited)
- Wellington City Council (personal thanks)
- Wellington Regional Council's Parks and Forests (personal thanks)
- Wescam USA (Wescam provided by) (as Wescam)

