Piorun

Piorun can refer to:
 * ORP Piorun, Polish Navy destroyer in World War II
 * Piorun (missile), Polish MANPADS
 * Krzysztof Mikołaj "Piorun" Radziwiłł, a 16th-century Polish nobleman
 * Polish name for the Slavic thunder god, Perun
 * Kacper Piorun, Polish chess player