- 1st Century of the First Age
- 2nd Century of the First Age
- 301st Folkmoot of Judgment
- 3rd Century of the First Age
- 4th Century of the First Age
- 5th Century of the First Age
- 6th Century of the First Age
- A Conspiracy Unmasked
- A Conspiracy Unmasked (The Complete Recordings)
- A Coronal of Silver and Gold
- A Description of the Island of Númenor
- A Dictionary of Tolkien
- A Drinking Song
- A Far Green Country
- A Good Omen
- A Journey in the Dark
- A Knife in the Dark
- A Knife in the Dark (soundtrack)
- A Liar and a Thief
- A Long-expected Party (chapter)
- A Magpie's Nest
- A Night in Rivendell
- A Question of Time: J.R.R. Tolkien's Road to Faërie
- A Rhyme of Lore
- A Secret Vice
- A Shadow Lies Between Us
- A Short Cut to Mushrooms
- A Short Rest
- A Shortcut to Mushrooms
- A Spell of Concealment
- A Storm is Coming
- A Thief in the Night
- A Thief in the Night (soundtrack)
- A Thunder Battle
- A Tolkien Bestiary
- A Tolkien Compass
- A Troll-Hoard
- A Very Respectable Hobbit
- A Walking Song
- A Warm Welcome
- Accursed Years
- Acharn
- Adalbert Bolger
- Adaldrida (Bolger) Brandybuck
- Adalgar Bolger
- Adalgrim Took
- Adam Brown
- Adam Reuel Tolkien
- Adamant
- Adamanta (Chubb) Took
- Adanel
- Adaptations of The Lord of the Rings
- Adelard Took
- Adorn
- Adrahil (disambiguation)
- Adrahil I
- Adrahil II
- Adrian Webster
- Adso's Camp
- Adurant
- Adûnaic
- Aeglos
- Aeglos (plant)
- Aegnor
- Aelin-uial
- Aerandir
- Aerin
- Afterlithe
- Afteryule
- Agaldor
- Agandaûr
- Agathor
- Ages of Arda
- Aghan
- Aglahad
- Aglon
- Aidan Turner
- Ailinel
- Ainulindalë
- Ainur
- Akallabêth
- Alalminórë
- Alan Howard
- Alan Lee
- Alan Menken
- Alastair Duncan
- Alatar
- Albert Dreary
- Alcarin
- Alcarinquë
- Alcarondas
- Aldamir
- Aldarion and Erendis: The Mariner's Wife
- Aldburg
- Aldor
- Aldor (movie character)
- Aldunenië
- Alexander Lindsay
- Alexandra Astin
- Alfrid Lickspittle
- Alfrida of the Yale
- Algund
- Alistair Browning
- All that Glitters
- All that is Gold Does Not Glitter
- Allan Curless
- Allegiance to Denethor
- Allen & Unwin
- Alley of Roses
- Alliance
- Almaren
- Almarian
- Almiel
- Alphros
- Alqualondë
- Aman
- Amanda Campbell
- Amandil
- Amani Johara
- Amanyar
- Amaranth Brandybuck
- Amarië
- Amazon's Middle-earth TV series
- Amazon Studios
- Ambar
- Ambarkanta
- Ambush in Ithilien
- Ambush of Mirkwood
- Ambush of the Rohirrim
- Ambush of the Wargs
- Amdír
- American Tolkien Society
- Amethyst (Hornblower) Bolger
- Amlach
- Amlaith
- Amnon
- Amon Anwar
- Amon Darthir
- Amon Dîn
- Amon Ereb
- Amon Ethir
- Amon Gwareth
- Amon Hen
- Amon Lanc
- Amon Lhaw
- Amon Obel
- Amon Rûdh
- Amras
- Amrod
- Amroth
- Amroth's House
- Amrothos
- An Ancient Enemy
- An Atlas of Tolkien
- An Evening in Rivendell
- An Unexpected Party
- An Unexpected Party (mission)
- An Unexpected Party (soundtrack)
- Anairë
- Anar (Dwarf)
- Anar Kaluva Tielyanna
- Anardil
- Anarrima
- Anborn
- Ancalagon
- Ancient Grey Mountains
- Andram
- Andrast
- Andrath
- Andreth
- Andrew Lesnie
- Andrew McDonald
- Andriel
- Androth
- Andróg
- Anduin
- Andustar
- Andvír
- Andwise Roper
- Andy Gunn
- Andy Serkis
- Andúnië
- Andúril
- Andúril - Flame of the West
- Anendel
- Anfalas
- Angainor
- Angamaitë
- Angband
- Angbor
- Angbor (rock)
- Angelica Baggins
- Angelimir
- Angerthas
- Anglachel
- Anglor
- Angmar
- Angmar, Malmö Tolkiensällskap
- Angmar war
- Angmarim
- Angrim
- Angrist
- Angrod
- Anguirel
- Angus Dunn
- Ann-thennath
- Annael
- Annals of Arda
- Annals of Beleriand
- Annals of Valinor
- Annette Crosbie
- Annie Lennox
- Annon-in-Gelydh
- Annúminas
- Anson Roper
- Anthony Boyle
- Anthony Daniels
- Antony Sher
- Anything You Can Imagine
- Anárion
- Aníron
- Anórien
- Aorangi Forest Park
- Appendices
- Appendix A
- Appendix B
- Appendix C
- Appendix D
- Appendix E
- Appendix F
- April
- April 1
- April 10
- April 11
- April 12
- April 13
- April 14
- April 15
- April 16
- April 17
- April 18
- April 19
- April 2
- April 20
- April 21
- April 22
- April 23
- April 24
- April 25
- April 26
- April 27
- April 28
- April 29
- April 3
- April 30
- April 4
- April 5
- April 6
- April 7
- April 8
- April 9
- Ar-Adûnakhôr
- Ar-Gimilzôr
- Ar-Pharazôn
- Ar-Sakalthôr
- Ar-Zimrathôn
- Arachon
- Arador
- Araglas
- Aragorn's Return
- Aragorn's dagger
- Aragorn's standard
- Aragorn (disambiguation)
- Aragorn I
- Aragorn II Elessar
- Aragost
- Arahad (disambiguation)
- Arahad I
- Arahad II
- Arahael
- Araman
- Aranarth
- Arandor
- Aranel
- Aranrúth
- Arantar
- Aranuir
- Aranwë
- Araphant
- Araphor
- Arassuil
- Aratan
- Aratar
- Arathorn (disambiguation)
- Arathorn I
- Arathorn II
- Araval
- Aravir
- Aravorn
- Archer
- Archet
- Arciryas
- Ard-galen
- Arda
- Arda Marred
- Arda Unmarred
- Ardamir (son of Axantur)
- Aredhel
- Argeleb (disambiguation)
- Argeleb I
- Argeleb II
- Argon
- Argonath
- Argonui
- Arien
- Arithir
- Arkenstone
- Armenelos
- Arminas
- Army of the Dead
- Arnor
- Arod
- Aros River
- Arossiach
- Arroch
- Arrowtown Recreational Reserve
- Artamir
- Arthad
- Arthedain
- Arthedain - Norges Tolkien Forening
- Arthur Avis
- Arvedui
- Arvegil
- Arveleg (disambiguation)
- Arveleg I
- Arveleg II
- Arvernien
- Arwen
- Arwen's Fate
- Arwen's grave
- Ascar
- Asfaloth
- Asgon
- Ash Mountains
- Asphodel (Brandybuck) Burrows
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