Conditional may refer to:

• Causal conditional, if X then Y, where X is a cause of Y
• Conditional mood, or conditional tense, a verb form in many languages (but not in English)
• Conditional sentence, discuss hypothetical situations and their consequences
• Indicative conditional, "If A then B" in ordinary English
  • Counterfactual conditional, or subjunctive conditional, indicates what would be the case if its antecedent were true
• Material conditional, in propositional calculus, or logical calculus in mathematics
• Strict conditional, in logic
• Relevance conditional, in relevance logic
• Conditional statement, in computer programming