The National Research State University of Nizhny Novgorod named after N.I. Lobachevsky, (Russian: Нижегородский национа́льный иссле́довательский госуда́рственный университе́т имени Н.И. Лобачевского), also known as Lobachevsky University, is a public research university in Nizhny Novgorod, Russia, and one of the biggest classical universities of the country. The university is ranked 1,455th in the world in the U.S. News & World Report Best Global Universities 2022–2023.

The university was established on January 17 (31), 1916 as Nizhny Novgorod People's University. From 1932 to 1990 it had the name of Gorky State University. In 2009, it was granted the status of a National Research University.

The university comprises 15 faculties and educational institutes, 5 research institutes, and 4 regional branches. As of 2023, the university had about 30,000 students (including international students), over 1,000 postgraduate and doctoral students, 1,200 associate and assistant professors, and 400 professors.