Chachi may refer to:
- Chhachi, sub-section of Kohli Khokran clan in India and Pakistan
- Chachi people, an indigenous people of Ecuador
- Chachi language (Cha'palaachi language), Barbacoan language spoken by the Chachi people
- Chachi Arcola, character on American television sitcom Happy Days
- Chachi Gonzales, dancer and member of dance crew I.aM.mE, winners of America's Best Dance Crew (season 6)
- ChachÃ, giant Argentinian ferns