Lonsdale College is a constituent college of the University of Lancaster, UK. It was one of the two founding colleges, originally built when the university first opened in 1964. It is also one of the largest colleges on campus in terms of Junior Common Room membership, with over 1,200 undergraduates. Like most other colleges in the university, the college is named after a region of the traditional county of Lancashire. The college takes its name from the Lonsdale area, the valley of the River Lune.