Ignatia can refer to:

• Gnatia, an ancient city of the Peucetii
• Ignatia amara, a homoeopathic remedy

• Callista Tyrol
• Callistemon citrinus
• Callistemon laevifolius
• Callistemon macropunctatus
• Callistemon pallidus
• Callistemon rugulosus
• Callistemon viminalis
• Callistephus chinensis
• Callisthenes (Seleucid)
• Callisto (astronomy)
• Callisto (band)
• Callisto Corporation
• Callistoctopus magnocellatus
• Callisto (Greek mythology)
• Callisto Productions
• Callisto series
• Callisto (TV)
• Callistratus (grammarian)
• Callistratus (jurist)
• Callistratus of Aphidnae
• Callistratus (sophist)
• Callistus (freedman)
• Callistus I
• Callistus I of Constantinople
• Call it a Day