Tottori Prefecture (鳥取県, Tottori-ken) is a prefecture of Japan located in the Chūgoku region of Honshu. Tottori Prefecture is the least populous prefecture of Japan at 570,569 (2016) and has a geographic area of 3,507 km2 (1,354 sq mi). Tottori Prefecture borders Shimane Prefecture to the west, Hiroshima Prefecture to the southwest, Okayama Prefecture to the south, and Hyōgo Prefecture to the east.

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Tottori is the capital and largest city of Tottori Prefecture, with other major cities including Yonago, Kurayoshi, and Sakaiminato. Tottori Prefecture is home to the Tottori Sand Dunes, the largest sand dunes system in Japan, and Mount Daisen, the highest peak in the Chūgoku Mountains.