The Blue Knights are a fraternal organization of police officers in the United States and Canada who have a strong interest in riding motorcycles for recreation.

Greg Valentine (born 1951), also known as "The Blue Knight", an American professional wrestler

The Blue Knight (novel), a novel by Joseph Wambaugh

HMM-365 - United States Marine Corps helicopter squadron known as the Blue Knights.

The Blue Knight (Tokyo Mew Mew) is the name of a fictional character in the manga and anime series Tokyo Mew Mew