Monaco's original flag, which was similar to its current princely flag but bore an older version of its coat of arms, was in use from the principality's early days (except during its annexation to France from 1793 to 1814) until the present, simpler design was adopted in 1881.

Another design (below), the banner of the state arms (lozenges in the Grimaldi family colours, in heraldic terms "lozengy argent and gules"), was used at various times, particularly in the 17th century, as an unofficial flag and still appears in some royal photographs.

The flag of Poland is also similar to that of Monaco, but with the colours reversed – white on top and red on the bottom.

The flag of Singapore also has a similar design and colour, with the exception being a crescent with five stars at the upper left side.

The personal standard of Prince Albert II consists of the Crown of Monaco over two opposing letters A, on a white background.