Anime

• Akko in Himitsu no Akko-chan (1988)
• Polaris Hilda in Saint Seiya
• Beron, in Kaizoku Sentai Gokaiger the Movie: The Flying Ghost Ship
• Remi, in Remi, Nobody's Girl
• Judy Abbott in My Daddy Long Legs
• Jeanie MacDowell in Jeanie with the Light Brown Hair
• Monica in Porphy no Nagai Tabi
• Sailor Galaxia in Sailor Moon Sailor Stars
• Narration, Cinderella in Grimm's Fairy Tale Classics
• Tsuntsunodanoteiyugo Tsun & Obotchaman in Dr. Slump Arale-Chan
• Upa in Dragon Ball
• Mitamura Yaeko "Yakko" in Ai Shite Knight
• Miyuki Moriki in Submarine Super 99
• Susumu Hori, Anna Hottenmeyer, and Puchi in the Mr. Driller series
• Woodward in Little Witch Academia (TV)

Dubbing

• Private School (1984 Fuji TV edition), Christine Ramsey (Phoebe Cates)^[4]
• West Side Story (1990 TBS edition), Maria (Natalie Wood)^[5][6]

Opening themes

• "Kurenai Sanshiro" Judo Boy (1969) (Her very first anime theme song; performed when she was only 12 years old)
• "Sazae-san" Sazae-san (1969) (Horie's song was used as the opening theme in 1975)
• "Akubi Musume" Hakushon Daimaou (2nd opening) (1969)
• "Mahou no Mako-chan" Mahō no Mako-chan (1970)
• "We Love You, We Love You!!! Witch Teacher" Majo Sensei (1971)
• "Midori no Hidamari" Yamanezumi Rocky Chuck (1973)
• "Kerokko Demetan" Kerokko Demetan (1973; also known as The Brave Frog)
• "Bokura Kyōdai Tentō Mushi" The Song of Tentomushi (1974)
• "Susume! Gorenger" with Isao Sasaki Himitsu Sentai Gorenger (1975–77)
• "Kum Kum's Song" Wanpaku Omukashi Kum Kum (1975)
• "La Seine no Hoshi" La Seine no Hoshi (1975)
• "Sinbad's Adventures" Arabian Nights: Sindbad no Boken (1975)
• "Watashi wa Candy" Candy Candy (1976)
• "Magne Robo Gakeen" with Ichirou Mizuki Magne Robo Gakeen (1976–77)
• "Tatakae! Ninja Captor!" with Ichirou Mizuki Ninja Captor (1976–1977)
• "Voltes V no Uta" Voltes V 1976–77
• "Little Lulu and Her Little Friends" "Little Lulu and Her Little Friends" (1976–1977)
• "Ashita e Attack!" Attack on Tomorrow (1977)
• "Yakukyou no Uta" Song of Baseball Enthusiasts (1977)
• "Majokko Tickle" Majokko Tickle (1978)
• Uchū Majin Daikengo (1978)
• "Hana no Ko Lunlun" Hana no Ko Lunlun (1979)
• "Hello Lalabel" Lalabel (1980)
• "Hello! Sandybell" Hello! Sandybell (1981)
• "Hashire! Jolie" Meiken Jolie (also known as Belle and Sebastian) (1981)
• "Dare ka Watashi wo Matte iru" The Wizard of Oz (1982)
• "Koi wa Totsuzen" Ai shite Knight(1983)
• "Cross Fight!" with Ichirou Mizuki Dangaioh (1987–89)
• "Himitsu no Akko-chan" Himitsu no Akko-chan (1st remake)(1988)
• Dagon in the Lands of Weeds (1988)
• "Yume no Hikouki" Wowser (TV Series) (1988-1989)
• "Growing Up" My Daddy Long Legs (1990)
• "Taiyō o Oikakete" Jeanie with the Light Brown Hair (1992)
• "Chō Ninja Tai Inazuma!! SPARK" Chō Ninja Tai Inazuma!! SPARK (2007)
• "New Moon ni Koishite" Sailor Moon Crystal (2016)

Ending themes

• "Akubi Musume" Hakushon Daimaou (1969)
• "Ran no Uta" Genshi Shonen Ryu (1971)
• "Kokoro no Uta" Wandering Sun (1971)
• "Makeru na Demetan" Kerokko Demetan (1973)
• "Rocky and Polly" Yamanezumi Rocky Chuck (1973)
• "Hiyoko de Shura" The Song of Tentomushi (1974)
• "Saurus-kun" Wanpaku Omukashi Kum Kum (1975)
• "Watashi wa Simone" La Seine no Hoshi (1975)
• "Sinbad's Song" Arabian Nights: Sindbad no Boken (1975)
• "Ashita ga Suki" Candy Candy (1976)
• "Kawa no Uta" Huckleberry no Bouken (1976)
• Chojin Sentai Baratack (1977)
• "Volleyball ga suki" Attack on Tomorrow (1977)
• "Yuuki no Theme" Song of Baseball Enthusiasts (1977)
• "I'm Lulu!" "Little Lulu and Her Little Friends" (1976–1977)
• "Tickle and Tiko's Cha-Cha-Cha" Majokko Tickle (1978)
• "Aozora-tte Iina" Doraemon (1979–2005) (Ending #7)
• "Mahou Shoujo Lalabel" Mahou Shoujo Lalabelle (1980)
• "Shiroi Suisen" Hello! Sandybell (1981)
• "Futari de Hanbunko" Meiken Jolie (1981)
• "Anata ni Shinjitsuichiro" Dr. Slump (1986)
• "Kokoro no Honesty" Dangaioh (1987–89)
• "DON'T YOU" Himitsu no Akko-chan (1988)
• "Kimi no Kaze" My Daddy Long Legs (1990)
• "Omoide no Kagami" Jeanie with the Light Brown Hair (1992)
• "Egao no Loop" Jewelpet (2009)

Insert songs

• "Daltanius no Uta" (for Daltanius 1979–80)
• "Koi no Hana Uranai" Hana no Ko Lunlun (1979)
• "Lilac no Hanakotoba" Hana no Ko Lunlun (1979)
• "My Beautiful Town" Mahou Shoujo Lalabelle (1980)

"Ashiato March"

"Fukafuka Jolie" (with "Tadashi")

"Jolie no Uta"

"Rena ga Suki"

"Shuppatsu no Uta"

• "Ichi Tasu Ichi wa Nani?" The Wizard of Oz (1982)
• "Athena no Komoriuta ~Lullaby~" (for Saint Seiya 1988)
• "Time" with Hironobu Kageyama (for Saint Seiya 1988)
• "Shine On ~Eien no Yume~" (for Saint Seiya 1990)
• "Golden Queen Galaxia" (Character song for Sailor Moon Sailor Stars 1996)
• "Susume! Driller!" (for Mr. Driller G 2001)
• "Suna to Shi no Ballad" (for Desert Punk 2005)

Original albums

• EMOTION (1980)
• IMAGE (1981)
• Ready MADONNA (1982)
• Weekend (1983)
• Sunao ni nare Nakute (1983)
• Live in Egg-man (1985)
• IN MY HEART (1986)
• SING IT! (1986)

Best albums

• TV Shudaika Hit Album Mitsuko Horie to Tomi ni (1971)
• Mitsuko Horie : TV Animation no Sekai (1977)
• Mitsuko Horie : Anime Roman no Sekai (1978)
• Mitsuko Horie Best 24 (1978)
• Mitsuko Horie New Hit Best 16 (1979)
• Micchi no Heya (1980)
• Mitsuko Horie : Anime Best Hit (1981)
• Anime Heroine : Mitsuko Horie Action Anime wo Utau (1982)
• Mitsuko Horie Original Best 12 (1984)
• Debut (1989)
• Mitsuko Horie 20th Anniversary Recital Vol. 1-2 (1989)
• Mitsuko Horie Original Best Album (1993)
• Mitsuko Horie : Best & Best (1995)
• Mitsuko Horie : Heartful Concert (1996)
• Kaiki Kottou Ongaku-bako (1997)
• Mitsuko Horie 30th Anniversary : MICCHI 100% ~Ashita ga Suki~ (1999)
• Kokoro no Uta~Iyashi no Uta goe~ Mitsuko Horie Best (2004)
• Mitsuko Horie 40th Anniversary (2009)
  • Best
  • Micchi no Hitorigoto Club
  • Encore
• Mitsuko Horie Rare Groove Tracks (2014)
• Best of Best : Mitsuko Horie (2015)
• Heisei no Mitsuko Horie (2019)
• Mitsuko Horie 50th Anniversary Best Album : One Girl BEST (2020)