Middlesex University, branded as Middlesex University London (MDX), is a British public research university based in London, England. It's main campus is located in the The Burroughs area of Hendon, in the Barnet borough of North London. The university also has campuses in Dubai, Malta and Mauritius. The name of the university is derived from its location within the historic county boundaries of Middlesex.

The university's history can be traced to 1878 when its founding institute, St Katharine's College, was established in Tottenham as a teacher training college for women. Having merged with several other institutes, the university was consolidated in its current form in 1992. It is one of the post-1992 universities (former polytechnics).

Middlesex has a student body of over 19,000 in London and over 37,000 globally. The university has student exchange links with over 100 universities in 22 countries across Europe, the United States, and the world. More than 140 nationalities are represented at Middlesex's Hendon campus alone. Additionally, it has campuses in Dubai and Mauritius as well as a number of local offices across the globe. Courses are delivered by the Faculty of Science and Technology, Faculty of Professional and Social Sciences, and the Faculty of the Arts and Creative Industries.

In 2023, it was awarded an overall rating of Silver by the Government's Teaching Excellence Framework. The university has been awarded the Queen's Anniversary Prize three times and has twice received Queen's Award for Enterprise for its international work.