Velankanni may refer to:

• Velankanni Town, a pilgrim town near Nagapattinam in the |Indian state of Tamil Nadu
• Our Lady of Good Health, or Velankanni Matha an apparition artributed to Mary, mother of Jesus
• Basilica of Our Lady of Good Health, a shrine in the town of Velankanni.

• Hylobittacus
• Hylobittacus apicalis
• Hylobius transversovittatus
• Hylocereeae
• Hylocharis cyanocarpa
• Hylocharis stokesii
• Hylochere
• Hylocitreidae
• Hylococcus
• Hyloconis bicruris
• Hyloconis luki
• Hyloconis luminata
• Hyloctistes virgatus
• Hylodes calcitrans
• Hylodes sazima
• Hylodidae
• Hylogeton
• Hylogeton ursinum
• Hylograptis thryptica
• Hyloicus selon
• Hylomenes
• Hylomyrma
• Hylomyrma balzani
• Hylomyscus anselli
• Hylomyscus endorobae