Didi may refer to:
People:
- Ibrahim Didi, Maldivian politician
- Didi Benami, American singer/songwriter
- Didi Conn, American actress
- Didi Petet, Indonesian actor
- Dietmar "Didi" Hamann, German football (soccer) player
- Dietmar "Didi" Kuhbauer, Austrian football (soccer) player
- Didi Silva, Brazilian football (soccer) player
- Renato "Didi Mocó" Aragão, Brazilian humorist
- Sebastião "Didi" Pereira do Nascimento, Brazilian football (soccer) player
- Valdir "Didi" Pereira, Brazilian football (soccer) player
- Didi Senft, also known as "Didi the Devil", colorful spectator of cycle races
- Didi Pickles, mother of Tommy and Dil in the cartoons Rugrats and All Grown Up!
- Didi, commonly spelled "Deedee", a character in the cartoon Dexter's Lab
- Didi, the principal character in Didi's Comedy Show, a German comedy television show
Other:
- Didi, a name some South American tribes use for red-haired 'jungle men', possibly an unknown ape. See Maricoxi and Ameranthropoides loysi
- "Elder sister", in several Indian languages
- Didi, a 1960 Hindi film
- Didi, a song by Khaled
- "Younger brother", in Mandarin Chinese