Demographics of Iceland - Icelandic National Registry

Icelandic National Registry

All living Icelanders, as well as all foreign citizens with permanent residence in Iceland, have a personal identification number (kennitala) identifying them in the National Registry. This number is composed of 10 digits, whereof the first six are made up of the individual's birth date in the format DDMMYY. The next two digits are chosen at random when the kennitala is allocated, the 9th digit is a check digit, and the last digit indicates the period of one hundred years in which the individual was born (for instance, '9' for the period 1900–1999). An example would be 120192-3389. While similar, all-inclusive personal registries exist in other countries, the use of the national registry is unusually extensive in Iceland. For example, video rentals register their customers using the registry identification numbers. It is worth noting that the completeness of the National Registry eliminates any need for census to be performed.