| Mikołaj Daniłowicz | |
| House-Type: | Szlachta |
| Noble Family: | Daniłowicz |
| Coa: | Sas |
| Father: | Stanisław Daniłowicz |
| Mother: | Katarzyna Tarło |
| Spouse: | Helena Uchańska h. Radwan |
| Spouse-Type: | Consort |
| Issue: | Piotr Daniłowicz Jan Daniłowicz Franciszek Daniłowicz Zofia Daniłowicz Stanislaw Daniłowicz Mikolaj Daniłowicz Izabela Daniłowicz Anna Daniłowicz |
| Birth Date: | c. 1558 |
| Death Date: | 30 May 1624 |
Mikołaj Daniłowicz (c. 1558 – 30 May 1624) was a Polish–Lithuanian nobleman and politician. He was Castellan of Lviv from 1614, Treasurer of the Crown Court from 1610, Grand Treasurer of the Crown from 1617, Speaker of the Sejm in 1593, amongst many other positions as governors of various states.
Educated in 1581 at the University of Dillingen, he went to Sweden during the rule of Sigismund III Vasa. He took part in the Jan Zamoyski expedition and during the Zebrzydowski rebellion took the side of the ruler. In 1607 he was envoy to Turkey.
In 1621 he erected a manor house in Warsaw, destroyed during the Swedish invasion, and was rebuilt as the Zaluski Library (Bibliotekę Załuskich).[1]
His son, Jan Mikołaj Daniłowicz, also served as Grand Treasurer of the Crown. His brother Jan Daniłowicz was the grandfather of King Jan III Sobieski.