Hakodate (函館市; -shi) is a city and port located in Oshima, Hokkaido, Japan.
As of 2003, the city has an estimated population of 283,215 and the density of 816.42 persons per km². The total area is 346.90 km².
The city was founded on August 1, 1922 and the port was opened to American trade under the conditions of the Treaty of Kanagawa, negotiated by Commodore Matthew Perry, March 31, 1853.