Jan Mikołaj Daniłowicz (born 1607 in Vilnius – 20 November 1650) was a Polish–Lithuanian noble and politician.

He was the son of Mikołaj Daniłowicz, Grand Crown Treasurer from 1617 to 1624.

Known as a skillful administrator and commended for the ability to gather funds for the Polish-Swedish wars and Smolensk War.

He married Sophie Tęczyńską, the daughter of Gabriel Tęczyński.

This biography of a Polish noble is a stub.