Istúriz is a surname. Notable people with the surname include:
Antonio López-Istúriz White (born 1970), Spanish politician Aristóbulo Istúriz Almeida (1946–2021), Venezuelan politician and academic Carlos Isturiz (born 1960), Venezuelan diver Francisco Javier de Istúriz y Montero (1785–1871), Spanish politician and diplomat Ramón Echarren Istúriz (1929–2014), Spanish Roman Catholic bishop