Trenary is a surname. Notable people with the surname include:
Cassandra Trenary (born 1993), American ballet dancer Jill Trenary (born 1968), American ice skater Michael Trenary, American chemist Philip Trenary (1954–2018), American businessman
See also Trenary, unincorporated community; see Mathias Township, Michigan, United States Wilfred Trenery (1867–1905), South African rugby union player