Long Island University had a total enrollment of 16,689 students in 2024. The full-time enrollment at Long Island University is 8,224 students and the part-time enrollment is 8,465. This means that 49.3% of students enrolled at Long Island University are enrolled full-time.

The enrolled student population at Long Island University, both undergraduate and graduate, is 43.2% White, 14.9% Hispanic or Latino, 10.7% Asian, 8.72% Black or African American, 2.49% Two or More Races, 0.132% American Indian or Alaska Native, and 0.0959% Native Hawaiian or Other Pacific Islanders.

Students enrolled at Long Island University in full-time Undergraduate programs are most commonly White Female (25.2%), followed by White Male (13.7%) and Hispanic or Latino Female (10.8%). Students enrolled in full-time Graduate programs are most commonly White Female (28.3%), followed by Hispanic or Latino Female (8.2%) and White Male (7.83%).