Hornbrook is a surname. Notable people with the surname include:
Alfred Hornbrook, New Zealand settler at Mount Pleasant in 1849 Bruce Hornbrook Sage (1909–1983), American chemical engineer and lecturer Chris Hornbrook, American musician, founding member of metalcore band Poison the Well Hester Hornbrook, co-founder of the Melbourne City Mission in 1854 James Joseph Hornbrook (1868–1942), American brigadier general during World War I Olive MacFarland (née Hornbrook; 1872–1962), American artist and illustrator Rebecca Hornbrook (born 1975), Canadian atmospheric chemist Thomas Hornbrook, whose name was the source of the former name of Wheeling Park, a park in Wheeling, West Virginia, U.S. Thomas Lyde Hornbrook (1807–1855), British marine artist
Fictional characters Cathi Hornbrook, in A Dream of Kings (novel), American novel published in 1955
See also Hornbrook, California, a place in the United States Hornbrook Formation, a geological formation in California, U.S. Hornbrook's Park, now Wheeling Park Hornibrook, a surname