Navicella, an Italian word meaning "little ship", may refer to:

• Navicella (diatom), a genus of diatoms in the family Cymbellaceae
• Navicella (fungus), a genus of fungi in the family Massariaceae
• Septaria (gastropod), a genus of fresh and brackish water snails where Navicella is a synonym

• Navicella (mosaic), a large mosaic after Giotto of a "Ship of the Church" which dominated the porch of Old Saint Peter's in Rome, or similar subjects in art