Neptunia

Neptunia may refer to:

• Neptunia (genus), a genus of plants within the subfamily Mimoseae
• Neptunia (Darkwing Duck), a cartoon character in the television series Darkwing Duck
• MV Neptunia, an Italian coaster
• Hyperdimension Neptunia, a video game series
• Hyperdimension Neptunia (video game), a 2010 role-playing video game, the first game in the series
• Neptunia, Roman colony at Taranto, Italy
• Neptunia, Uruguay, a resort location in Canelones Department, Uruguay