Logical Investigations

Logical Investigations (German: Logische Untersuchungen) can refer to:


 * Logical Investigations (Trendelenburg), 1840 work by Friedrich Adolf Trendelenburg
 * Logical Investigations (Husserl), 1900–1901 work by Edmund Husserl
 * Logical Investigations (Frege), 1918–1923 work by Gottlob Frege