Longyao may refer to:

• Dragon kiln, a traditional kiln used for Chinese ceramics
• Longyao County, a county in southern Hebei, China, under the administration of Xingtai
  • Longyao Town, in Longyao County

• Vitamin-K-epoxide reductase (warfarin-insensitive)
• Vitamin-K-epoxide reductase (warfarin-sensitive)
• Vitaminless (album)
• Vitamin O (product)
• Vitamin pill
• Vitamin PP
• Vitamin Q10
• Vitamin Records
• Vitamin R (Leading Us Along)
• Vitaminsforyou
• Vitamin S (song)
• Vitamin String Quartet
• Vitamin supplement
• Vitaminwater
• Vitamin World
• Vitamin X
• Vitamin Z
• Vitamn C (singer)
• Vita-More
• Vita (Nanoha)
• Vitan, Bucharest
• Vitandgad
• Vitangelo Spadavecchia
• Vitangelo Spada Vecchia
• Vitani