Fonsi may refer to:

• Luis Fonsi (born 1978), Puerto Rican singer
• Fonsi Nieto (born 1978), Spanish motorcycle racer
• Fonsi (footballer) (born 1986), Spanish footballer
• FONSI (finding of no significant impact)

• All pages with titles beginning with Fonsi
• All pages with titles containing Fonsi
• Fonzie
• Fonzi (disambiguation)
• Fonzy
• Fozzie
• Fozzy (disambiguation)