| Nikola Tomašić | |
| Order: | Ban of Croatia-Slavonia |
| Term Start: | 5 February 1910 |
| Term End: | 19 January 1912 |
| Predecessor: | Pavao Rauch |
| Successor: | Slavko Cuvaj |
| Order2: | Minister of Croatian Affairs of Hungary |
| Term Start2: | 27 June 1903 |
| Term End2: | 3 November 1903 |
| Predecessor2: | Ervin Cseh |
| Successor2: | Ervin Cseh |
| Birth Date: | 1864 1, df=yes |
| Birth Place: | Zagreb, Kingdom of Croatia, Austrian Empire |
| Death Place: | Treščerovac near Ozalj, Kingdom of Croatia-Slavonia, Austria-Hungary |
| Profession: | Politician, lawyer, economist, translator |
| Party: | People's Party Croatian National Party |
Nikola Tomašić (Hungarian: Miklós Tomassich or Miklós Tomasics; 13 January 1864 – 29 May 1918) was a Croatian politician, who served as ban (viceroy) of the Kingdom of Croatia-Slavonia. In 1903 he served as Minister without portfolio of Croatian Affairs.