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

Odense Harbour is the port of Odense, Denmark. Founded in 1803, Denmark's only canal harbour is the country's seventh largest commercial port in terms of turnover. It consists primarily of Inner Harbour, at the end of Odense Canal, and Odense Steel Terminal of Munkebo, which is located adjacent to the Odense Steel Shipyard. The port has a land area of approximately 4,000,000 square metres (43,000,000 sq ft) and a water area of almost 1,000,000 square metres (11,000,000 sq ft). Its industrial importance has declined since the 1960s, but a transformation is underway, including new residential and small business areas.