The surname Tardy has multiple origins. It is an old French family name. It may also refer to a number of families of Hungarian nobility: Tardy alias Lélek, Tardy alias Pap, Tardy alias Szeles, Tardy de Csaholy, Tardy de Kisár, Tardy de Kőröstopa et Mezőtelegd, Tardy de Tard.
The surname may refer to:
Donald Tardy (born 1970), American drummer
Gregory Tardy (born 1966), American jazz saxophonist
Jacque Alexander Tardy (1767-1827), a French pirate
James Tardy, (between 1773 and 1787 – 1835), an Irish naturalist
John Tardy (born 1968), American singer
Joshua Tardy, American politician
Lionel Tardy (born 1966), French politician
Louis-Marie-François Tardy de Montravel
Marion Tardy, French water polo player
Richard Tardy (born 1950), a French football manager
