Cruchaga is a surname. Notable people with the surname include:
Albert Hurtado Cruchaga or Alberto Hurtado (1901–1952), Chilean Jesuit priest, lawyer, social worker and writer of Basque origin Angel Cruchaga Santa María (1893–1964), Chilean writer Carlos González Cruchaga (1921–2008), Chilean Bishop of the Roman Catholic Church César Cruchaga (born 1974), retired Spanish football defender Juan Guzmán Cruchaga (1895–1979), Chilean poet and diplomat Carlos Cruchaga (born 1978), human genomicist researcher focusing neurodegenerative diseases