a person from ilkley is called an olicanian which is derived from olicana, thought to be the name of the roman fort ilkley is built upon. the ethnic make-up of ilkley's population is 98.02% white, 0.74% mixed, 0.72% asian, 0.37% chinese or other ethnic group and 0.14% black. the largest age group is 45- to 59-year-olds (20.73%).