Counties (县) are found in the third level of the administrative hierarchy in provinces and autonomous regions and the second level in municipalities and Hainan, a level that is known as "county level" and also contains autonomous counties, county-level cities, banners, autonomous banners and city districts. There are 1,355 counties in mainland China out of a total of 2,851 county-level divisions.
The term xian is sometimes translated as "district" or "prefecture" when put in the context of Chinese history.