The coat of arms and banner of San Vito Romano were formally recognised in 1956, at the end of a procedure the Municipality had begun as early as the first decades of the 20th century. The coat of arms was recognised by decree of the President of the Council of Ministers in January 1956, while the banner was granted by Decree of the President of the Republic in March of the same year.
The coat of arms depicts Saint Vitus dressed as a warrior, with a red cloak and the palm of martyrdom, accompanied by his dog. Beside the saint stands a silver column, taken from the coat of arms of the former feudal lords, the Colonna princes of Genazzano. In the background is a golden sun with sixteen rays.
The meaning of the sun is not clear-cut: according to the interpretation reported by the Municipality, it may represent eternity and greatness, or recall the arms of the Theodoli family, whose coat of arms featured a golden rayed wheel.
The emblem is completed by the mural crown, which identifies the Municipality as a territorial body, and by two crossed branches of oak and laurel, which are decorative elements.
The banner reproduces the municipal coat of arms on a red cloth, with a yellow central pale and silver embroidery, in the form laid down by the decree granting it.