Nosson Tzvi Finkel (Hebrew: נתן צבי פינקל, Sephardic/Israeli: Natan Tzvi; Yiddish: נָטע הערש, romanized: Nota Hirsch; 1849–1927) was an influential Lithuanian Jewish leader of Orthodox Judaism in Eastern Europe and founder of the Slabodka yeshiva, in the town of Sloboda Vilyampolskaya (now Vilijampolė, a suburb of Kaunas).

He had special agents who would keep an eye out all over Europe for teenagers with an aptitude for both scholarship and leadership, recruiting them and bringing them back to Slobodka.

The rabbinical and Talmudical graduates of the Slobodka Yeshiva tried to live up to a higher code of dress and deportment, to the point of being accused of being dandies.

He would send teams of his trained prized pupils to places that needed a boost in religious observance and learning of Torah.

To this day, the Brisk yeshivos, based mainly in Jerusalem today, do not teach mussar (ethics) as a separate curriculum, but focus on pure Talmud study.

In his view, too many new enticing secular ideologies, such as Socialism and Zionism and the very real lure of atheism in universities, were becoming a replacement for traditional Judaism for many young Jews.