Abashiri is a city located in Okhotsk Subprefecture, Hokkaido, Japan.
Abashiri is known as the site of the Abashiri Prison, a Meiji-era facility used for the incarceration of political prisoners. Now the old prison has been turned into a museum, but the city's new maximum security prison is still in use.
As of 2008, the city has an estimated population of 40,333 and a population density of 85.6 persons per km². The total area is 470.94 km².
Abashiri is located in the eastern part of Abashiri Subprefecture, about 50 kilometers east of Kitami. There are no tall mountains, but there are many hills. Abashiri River flows and there are three lakes (Lake Abashiri, Lake Notori and Lake Tōfutsu) in the city. In the winter, tourists visit the city to watch the drift ice.