What If may refer to:

Look up what if in Wiktionary, the free dictionary.

• What If, a 2006 TV film starring Niall Buggy
• What If... (2010 film), an American film
• What If... (2012 film), a Greek film
• What If (2013 film) or The F Word, a Canadian-Irish film

• What/If, a 2019 American thriller streaming miniseries
• What If... (web series), a 2010 American soap-opera crossover series
• What If...? (TV series), a 2021 American animated series by Marvel Studios
• "What If..." (Agents of S.H.I.E.L.D.), an episode of Agents of S.H.I.E.L.D.
• "What If" (Drop Dead Diva), an episode of Drop Dead Diva
• "What If?" (JAG), an episode of JAG

• Alternate history, fiction based on what if historical questions
• Alternate universe (fan fiction), fiction based on what if questions in fiction
• "What If—", a fantasy short story by Isaac Asimov
• What If? (book), an xkcd blog and associated book by Randall Munroe
• What If (comics), comic book series featuring alternate versions of the Marvel Comics universe
• What If? (essays), an anthology of counterfactual history essays
• What If? (magazine), a Canadian arts and literature youth magazine
• What If...?: Amazing Stories selected by Monica Hughes, a book by Monica Hughes

• What-if analysis, or sensitivity analysis, the study of how model output varies with changes in input
• What if chart, a visual tool for modeling the outcome of a combination of different factors
• WHAT IF software, a molecular modeling and visualization package

• Alternate history
• Counterfactual history
• If (disambiguation)
• Hypothetical question
• Uchronia
• What (disambiguation)
• All pages with titles beginning with What If

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