 The Central Interior is composed, roughly, of the Chilcotin, Cariboo, Bridge River-Lillooet, Fraser Canyon, Nicola, Thompson and Kamloops-Shuswap Countries.Some usages may refer to the Okanagan cities south of the Shuswap as being in the Central Interior, but these are usually referred to as being in the Southern Interior or South-Central Interior.The Nicola, Fraser Canyon, Thompson and Bridge River -Lillooet Country are sometimes also referred to as being in the Southern Interior, with the Bridge River-Lillooet Country sometimes referred to, along with the Chilcotin, as the West-Central Interior, and the Lillooet Country is historically considered to be part of the Cariboo, though distinct in its own right.