Plugs & voltage in Vietnam
Types A, C and F · 220 V · 50 Hz
The same answers apply to Cambodia.
No other country of the 139 uses exactly this combination, Types A, C and F. The closest match is Indonesia (C/F). Next door the nominal figure varies within the same range: Cambodia and Laos list 230 V, while China shares the 220 V used here.
Do I need an adapter for Vietnam?
Where are you travelling from?
Adapter, and mind the voltage.
Type A plugs fit; Type B plugs need an adapter to Types A, C or F.
220 V here, 120 V at home.
Bring an adapter to Types A, C or F.
Plug straight in.
Bring an adapter to Types A, C or F.
Bring an adapter to Types A, C or F.
Type A plugs fit; Type I plugs need an adapter to Types A, C or F.
Bring an adapter to Types A, C or F.
Type C plugs fit; Types D and M plugs need an adapter to Types A, C or F.
Adapter, and mind the voltage.
Type A plugs fit; Type B plugs need an adapter to Types A, C or F.
220 V here, 100 V at home.
The power supply
The plug types used here
Guides: Countries with several plug types, ranked · The 15 plug types explained
Source: Wikidata Q881; regions: UN M49 (South-eastern Asia). Sources & method