Eylau

Eylau can refer to:
 * Battle of Eylau during the Napoleonic Wars in 1807
 * Bagrationovsk (Preußisch Eylau) in Russia, until 1945 in East Prussia, Germany
 * Eylau, Texas
 * Iława (Deutsch Eylau) in Poland, until 1945 in West Prussia, Germany
 * French ship Eylau (1856)