Nyborg is a city in central Denmark, located in Nyborg Municipality on the island of Funen and with a population of 17,900 (2023). It is the easternmost settlement on Funen. By road, it is located 34 km east of Odense, 35 km north of Svendborg and 21 km south of Kerteminde. It also connects to Korsør through the Great Belt Bridge. Nyborg is the seat of Nyborg Municipality, and until 1793 it was also the seat of Nyborg County.

Nyborg Municipality is a kommune in the Region of Southern Denmark on the east coast of the island of Funen in central Denmark. The municipality covers an area of 278 km2, and has a total population of 32,262 (2023). It borders Kerteminde Municipality to the north-west, Faaborg-Midtfyn Municipality to the south-west, Svendborg Municipality to the south and is connected to Slagelse Municipality by the Great Belt Bridge. Its mayor is Kenneth Muhs, a member of the Venstre political party. The main town and the site of its municipal council is the city of Nyborg.