The 6C Survey of Radio Sources (6C) is an astronomical catalogue of celestial radio sources as measured at 151-MHz.^[1][2] It was published between 1985 and 1993 by the Radio Astronomy Group of the University of Cambridge.^{[3][4][5][6][7][8][9]}

The research that led to the catalogue's production also led to improvements in radio telescope design and, in due course, to the 7C survey of radio sources.^[1]

A similar survey of the Southern Hemisphere was made by the Mauritius Radio Telescope.^[10][11]