World’s most expensive cities 2021 January 9, 2023December 17, 2021 by Keith Donovan 8. Copenhagen, Denmark Copenhagen, Denmark ranks in at number 8 on the world’s most expensive to live in in 2021 Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21