An organic base is an organic compound which acts as a base. Organic bases are usually, but not always, proton acceptors. They usually contain nitrogen atoms, which can easily be protonated. Amines and nitrogen-containing heterocyclic compounds are organic bases. Examples include:

• pyridine
• methyl amine
• imidazole
• benzimidazole
• histidine
• phosphazene bases
• Hydroxides of some organic cations