Siddi may refer to:

• Sidi, an Arabic honorific
• Siddi, an ethnic group of Pakistan and India of African descent
• Siddis of Karnataka
• Siddhi, a Hindu spiritual term
• Siddi, Sardinia, the Italian comune
• Siddi, Nepal, village in Nepal
• Antonio Siddi, Italian sprinter

• The League Of Nations
• The League of Noble Peers
• The League of Super Evil
• The League of Youth
• The League series
• The League Unlimited Orchestra
• The Leak
• The Leaky Cauldron (pub)
• The Leanansidhe
• The Leander Club
• The Leaning Tower of Niles
• The Leap (How I Met Your Mother)
• The Learjet 31
• The Learned Man Defended and Reformed
• The Learned School of Reykjavik
• The Learning Center for Deaf Children
• The Learning Channel (UK)
• The Learning Channel UK
• The Learning Curve (film)
• The Learning Enrichment Foundation
• The Learning Station
• The Leas
• The Lea Shores
• The Least Among You
• The least I could do