Tomoyo is a feminine Japanese given name.

Tomoyo can be written using different kanji characters and can mean:

• 知世, "wisdom, world"
• 友世, "friend, world"
• 倫世, "ethics, world"
• 智代, "knowledge, world"
• 灯代, "light, world"
• 知葉, "wisdom, leaf"
• 朋与, "friend, bestow"

The name can also be written in hiragana (ともよ) or katakana (トモヨ).

• Tomoyo Harada (知世, born 1967), Japanese actress and singer
• Tomoyo Kurosawa (ともよ, born 1996), Japanese voice actress
• Tomoyo Matsumoto (知世, born 1987), former member of the rock group Bon-Bon Blanco
• Tomoyo Nonaka (ともよ, born 1954), Japanese television personality and businesswoman
• Tomoyo Oshima (ともよ, born 1949), Japanese film editor
• Tomoyo Shibata (倫世, born 1974), Japanese former announcer
• Tomoyo Takayanagi (高柳 知葉, born 1994), Japanese voice actress

• Tomoyo, a character from the novel Ghostwritten
• Tomoyo Daidōji (知世), a character from Cardcaptor Sakura
• Tomoyo Hime (知世), an alter-ego of Tomoyo Daidōji in Tsubasa: Reservoir Chronicle
• Tomoko Hanasaki (知世), a character from the manga series G-Taste
• Tomoyo Kanzaki (灯代), a character from the light novel series When Supernatural Battles Became Commonplace
• Tomoyo Kōsaka (友世), a character from the manga series A Devil and Her Love Song
• Tomoyo Kurobe (朋与), a character from the anime series True Tears
• Tomoyo Osaka (智世), a character from the manga series Crimson Hero
• Tomoyo Sakagami (智代), a character from the visual novel, manga, and anime series Clannad
• Tomoyo Sakurai (智代), a character from the manga series Heaven's Lost Property
• Tomoyo Wakagi (知葉), a character from the anime series Key the Metal Idol

• Tomoyo After: It's a Wonderful Life
• TOMOYO Linux, a Linux security module