Nordby is a Danish town, seat of the Fanø Municipality, in the Region of Southern Denmark. The population was 2,689 as of 1 January 2024. …Nordby is a Danish town, seat of the Fanø Municipality, in the Region of Southern Denmark. The population was 2,689 as of 1 January 2024. Nordby is on the island of Fanø, by the North Sea and not far from the city of Esbjerg.