Odense Boldklub is a Danish professional football club based in the city of Odense, in southern Denmark. The club has won three Danish championships and five Danish Cup trophies. OB play in the Danish Superliga and their home field is Nature Energy Park. OB's clubhouse is located in Ådalen near Odense River.

Odense is the third largest city in Denmark and the largest city on the island of Funen. As of 1 January 2023, the city proper had a population of 182,387 while Odense Municipality had a population of 207,762, making it the fourth largest municipality in Denmark. Eurostat and OECD have used a definition for the Metropolitan area of Odense, which includes all municipalities in the Province of Funen, with a total population of 504,066 as of 1 July 2022