Carlos Alonso (1929-2026) was an Argentine painter.
Carlos Alonso may also refer to:
Carlos Martínez Alonso (born 1950), State Secretary for Research in the Spanish Ministry for Science and Innovation Carlos Alonso Bazalar (born 1990), Peruvian footballer Carlos Alonso Gonzalez, "Santillana" (born 1952), Spanish footballer Carlos Alonso Kali (born 1978), Angolan footballer Carlos Alonso (Nicaraguan footballer) (born 1979), Nicaraguan footballer