Grom may refer to:

• JW GROM, a Polish special forces unit
• ORP Grom, several ships of the Polish Navy
• Grom (missile), a Polish anti-aircraft missile
• A Yugoslav/Serbian version of the Kh-23 (AS-9 'Kyle') air-to-surface missile
• 2A28 Grom, a Russian low pressure gun
• Kronshtadt Grom, a Russian jet UCAV
• Hrim-2, a missile being developed by Ukraine

• Franc Grom, Slovenian artist

• Gragjanska оpcija za Makedonija (Citizen Option for Macedonia), a political party in North Macedonia
• Grom (company), an Italian gelato company
• Honda Grom, a motorcycle
• Grom (album), an album by Polish extreme metal band Behemoth
• GROM, Graphics Read Only Memory, a type of memory used in the TI-99/4A Home Computer
• Grommet (sportsperson), a nickname for young participants in extreme sports
• Grom, Warmian-Masurian Voivodeship (north Poland)
• River Grom, England