Astier is a French surname. Notable people with the surname include:
Alexandre Astier (born 1974), a French writer, director, editor and actor Alexandre Astier (born 1968), a French writer on the religions in India Lilian Astier (born 1978), a French professional soccer player Marcel Astier (1885–1947), a French politician Pauline Astier (born 2002), a French basketball player Raphaël Astier (born 1976), a French modern pentathlete