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.

Funen, with an area of 3,099.7 square kilometres (1,196.8 sq mi), is the third-largest island of Denmark, after Zealand and Vendsyssel-Thy. It is the 165th-largest island in the world. It is located in the central part of the country and has a population of 469,947 as of 2020. Fyn's main city is Odense, which is connected to the sea by a seldom-used canal. The city's shipyard, Odense Steel Shipyard, has been relocated outside Odense proper.