Philosophical Investigations is a book by Wittgenstein.

Philosophical Investigations may also refer to:

• Philosophical Investigations (journal), an academic journal published by Wiley-Blackwell
• A book series covering diverse subjects in Applied Philosophy published by Routledge
• Linguistic and Philosophical Investigations, an academic journal published by Addleton Academic
• "Philosophical Investigations into the Essence of Human Freedom", a book by Friedrich Schelling

• A Philosophical Investigation, a novel by Philip Kerr

A performance act by Linda Phillimore reading her poem "Philosophical Investigation #76"

This disambiguation page lists articles associated with the title Philosophical Investigations.
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