Wainfelin () is a suburb of Pontypool (though part of the Pen Tranch community) in the county borough of Torfaen, in south-east Wales.
At the United Kingdom Census 2001 demographics showed:
Wainfelin forms an electoral ward electing a community councillor to Pontypool Community Council.
Until May 2022 Wainfelin was a ward to Torfaen County Borough Council. Following a 2021 boundary review, the ward was combined with the community of Pontymoile to form a new ward called Pontypool Fawr, electing three councillors.