The National University of Singapore, widely known as NUS, is Singapore's oldest university. It is the largest university in the country in terms of student enrollment and curriculum offered. International students are eligible for financial aid.

The university's main campus is located in southwest Singapore at Kent Ridge, with an area of approximately 1.5 km2 (0.58 sq mi). The Bukit Timah campus houses the Faculty of Law, Lee Kuan Yew School of Public Policy and research institutes, while the Duke-NUS Graduate Medical School Singapore is located at the Outram campus.

The former British Prime Minister Tony Blair had named NUS as the headquarters of his Asian Faith and Globalization Initiative together with Durham University in the UK and Yale University in the USA to deliver an exclusive programme in partnership with Tony Blair Faith Foundation.

In 2012, NUS was ranked 25th in the world and 2nd in Asia by the QS World University Rankings.

NUS has a semester-based modular system for conducting courses. It adopts features of the British system, such as small group teaching (tutorials) and the American system (course credits). Students may transfer between courses within their first two semesters, enroll in cross-faculty modules or take up electives from different faculties (compulsory for most degrees). Other cross-disciplinary initiatives study programmes include double-degree undergraduate degrees in Arts & Social Sciences and Engineering; Arts & Social Sciences and Law; Business and Engineering; and Business and Law.

NUS has 16 faculties and schools, including a Music Conservatory. Currently, it has seven overseas colleges at major entrepreneurial hubs in Shanghai and Beijing (China), Israel, India, Stockholm (Sweden), Silicon Valley and Bio Valley (US).