__NOTOC__ 4th Artillery Regiment may refer to:
Australia 4th Regiment, Royal Australian Artillery 2/4th Field Regiment (Australia) 2/4th Anti-Tank Regiment (Australia)
Italy 4th Anti-Aircraft Artillery Regiment "Peschiera" 4th Heavy Field Artillery Regiment (Italy) 4th Mountain Artillery Regiment (Italy)
United Kingdom 4th Regiment Royal Artillery 4th Searchlight Regiment, Royal Artillery/Royal Malta Artillery 4th Lancashire Artillery Volunteers
United States 4th Air Defense Artillery Regiment 4th Field Artillery Regiment 4th Continental Artillery Regiment 4th Massachusetts Heavy Artillery Regiment
Other countries 4th Artillery Regiment (General Support), Royal Canadian Artillery 4th Field Regiment (New Zealand) 4th Medium Regiment, Royal New Zealand Artillery 4th Artillery Regiment (Portugal)