City St George's, University of London is a public research university in London, England, and a member institution of the University of London. Founded in 1894 as the Northampton Institute, it officially became a university when the City University was created by royal charter in 1966. The Inns of Court School of Law, which merged with City in 2001, was established in 1852.

City joined the federal University of London on 1 September 2016, becoming City, University of London. In 2024, St George's, University of London, which was established in 1834, merged with the university, with the combined institution adopting its name City St George's, University of London the following year.

City St George's has strong links with the City of London, and the Lord Mayor of London serves as the university's rector. The university has Central London campuses spanning the London Borough of Islington; the City of London; and the London Borough of Wandsworth. It is organised into six schools, within which there are around forty academic departments and centres, including the Department of Journalism, Bayes Business School (formerly Cass Business School), and City Law School which incorporates the Inns of Court School of Law. The annual income of the institution for 2024–25 was £487.8 million, of which £24.4 million was from research grants and contracts, with an expenditure of £415.3 million.

The university is a member of the Association of MBAs, EQUIS and Universities UK. Alumni of City St George's include members of Parliament of the United Kingdom, politicians and CEOs.