This is a list of indoor arenas in Europe by capacity. A broad definition of "Europe" is used here, including the entirety of Russia, Turkey, Armenia, Georgia and Kazakhstan.
The following is a list of arenas ordered by seating capacity, which is the maximum number of seated spectators the arena can accommodate for a sports event. Only the capacity for indoor sports, such as basketball, badminton, handball, ice hockey, tennis and volleyball, are included. Currently all arenas with a minimum capacity of 10,000 are included, some of which do not regularly host any sports. There is typically more capacity available if additional/temporary seats and standing room is included (i.e. for hosting concerts and other events like boxing). Other types of indoor event venues (such as a convention center) which can be used as an arena are not included unless the arena is housed in a separate designated part of the building or complex.