Hiyama may refer to:

Hiyama (surname), a Japanese surname Hiyama Subprefecture, a subprefecture of Hokkaidō, Japan Hiyama District, Hokkaidō, a district in Hiyama Subprefecture

See also Hiyama coupling, a carbon-carbon bond-forming reaction Nozaki–Hiyama–Kishi reaction, a carbon-carbon bond-forming reaction