Famous alumni
External links St John's College, Cambridge official webpage (http://www.joh.cam.ac.uk/)
... family size is 3.47. In the town the population is spread out with 28.2% under the age of 18, 7.5% from 18 to 24, 33.5% from 25 to 44, 23.9% from 45 to 64, and 6.9% ...