Saint Piran's Flag (Cornish: Baner Peran) is the flag of Cornwall. The earliest known description of the flag, referred to as the Standard of Cornwall, was written in 1838. It is used by the Cornish people as a symbol of their identity.

Standard of the Duke of Cornwall.

Flag of the Duchy of Cornwall, flown outside the Duchy's offices in London.

A square banner of the Earl's coat of arms. 

A banner of the arms of the Boscawen family (the current holders of the title), flown atop the country house of Tregothnan. 

The Scillonian Cross, top half gold; representing the golden sand of the beaches, bottom half blue; representing the sea. Also with the top right corner picturing stars representing the location of the islands. 

A Saint George's Cross defaced with the coat of arms of the Diocese in the canton. 

A white eagle flying westwards over a gold map of Cornwall on a field of blue.

A Saint Piran's Cross with two horizontal gold stripes in each quarter. 

A banner used by the Cornish Wrestling Association, based on that allegedly used by Cornish soldiers at Agincourt. The text above the wrestlers reads "KERNOW BYS VYKEN" ("CORNWALL FOREVER"), and the text below the wrestlers reads "GWARY WHEK YU GWARY TEK" ("GOOD PLAY IS FAIR PLAY")

Banner used by Gorsedh Kernow

A white burgee divided by a red Saint George's Cross with the shield from the arms of the Duchy of Cornwall in the canton.

Blue Ensign, with the Prince of Wales's feathers heraldic badge.

Red Ensign, with the coat of arms of the Duke of Cornwall. 

A white-and-red quartered burgee with the shield from the arms of the Duchy of Cornwall in the canton.

A white cross on a blue field, with each quarter containing one of the company's initials in red.

Designed like the Red Ensign. 

Black flag with a white cross, and a Union Jack in the canton. 

A black field divided by a white cross, with a Union Jack in the canton and the Standard of the Duke of Cornwall in the lower fly. 

The Cornish flag defaced with the Standard of the Duke of Cornwall in the canton. 

The Cornish flag defaced with the Standard state badge of Australia. 

The Cornish flag defaced with the Standard Starts of the Australian Flag. 

The Cornish Flag defaced with Rainbow Stripes.