Dmitry Vladimirovich Karakozov (Russian: Дми́трий Влади́мирович Карако́зов; 4 November [O.S. 23 October] 1840 – 15 September [O.S. 3 September] 1866) was a Russian political activist and the first revolutionary in the Russian Empire to make an attempt on the life of a tsar. His attempt to assassinate Tsar Alexander II failed and Karakozov was executed.