Sif Aradóttir (born c. 1985) was Ungfrú Ísland or Miss Iceland in 2006.^[1][2] She is from Keflavík.

At the time of her crowning as Iceland's national beauty queen, which was televised live on Icelandic Television, Sif was a student training to be an air traffic controller.

Organizers of the national contest decided to send Sif to compete in Miss Universe 2006 (to be held in Los Angeles, California on 23 July) after a three-year unexplained absence.^[3]

This also marked the first time in three years that the winner was not sent to Miss Universe's rival pageant Miss World, which was won by Iceland's own Unnur Birna Vilhjálmsdóttir in 2005. Sif's runner-up, Ásdís Svava, was Iceland's representative at Miss World 2006.^[3]