Jan Mikołaj Daniłowicz

Jan Mikołaj Daniłowicz (1607, Vilnius - 20 November 1650) was a Polish-Lithuanian noble and politician. Crown Podstoli from 1620, Crown Court Treasurer from 1627, and from 1632, Grand Crown Treasurer.

Known as a skillful administrator and commended for the ability to gather funds for the Polish-Swedish wars and Smolensk War. At the same time he was one of the wealthiest, if not the wealthiest, magnates in the Commonwealth.