| Native Name: | Βασίλης Βλαχόπουλος |
| Resting Place: | First Cemetery of Athens |
| Spouse: | Thalia Sdrallis |
| Children: | Orestes Vlachopoulos |
| Alma Mater: | Hellenic Army Academy |
| Party: | Liberal Party |
| Birth Date: | 18 Dec 1883 |
| Birth Place: | Agrinio, Greece |
| Death Date: | 28 Dec 1944 |
| Death Place: | Athens, Greece |
| Awards: | Grand Commander of the Order of the Redeemer Legion of Honour Medal of Military Merit Order of George I Greco-Turkish War 1912-1913 |
| Battles: | Greco-Turkish War (1897) Balkan Wars |
| Allegiance: |  Kingdom of GreeceSecond Hellenic Republic |
Vassilis Vlachopoulos (Greek: Βασίλης Βλαχόπουλος), also known as Vassilis Vlahopoulos, (Agrinio, 1883 – Athens, 1944) was a general, fighter in the First and Second Balkan Wars, World War I and the First and Second Greco-Turkish Wars, and a member of parliament for the liberals under Eleftherios Venizelos.
Vassilis Vlachopoulos was born in Agrinio in 1883. He enrolled in the Hellenic Military Academy and graduated. He served during the Balkan Wars of 1912–13.
On April 8,1915 he was sent to Kragujevac, Serbia to determine the possibility of the Serbian Government fulfilling its military obligations towards the Entente. Radomir Putnak, the Chief of Staff of the Supreme Command of the Serbian Army, refused to discuss the matter and on August 10, 1915, would inform Vlachopoulos that the transport of 150,000 Serbian combat troops to the Bulgarian border was not possible in the event that Sofia were to declare war.[1]
He took part in the 1926 elections as a candidate for parliament for the constituency of Aetolia-Acarnania with the Liberal Party and received 622 votes.[2]
In 1938, Vassilis along with other descendants of leaders of the Greek War of Independence, founded the Patriotic Association of Descendants of the Fighters of 1821 in Athens at the King George Hotel.[3]