Janet Marion Davies (born 29 May 1939 in Cardiff) is a Plaid Cymru Welsh politician.

In 1976, Davies ran to represent the Llanharry and Llaniltud ward on Taff Ely Borough Council, but was not elected.

[5][6] She contested the Pontypridd constituency for Plaid Cymru in the 1983 General Election, finishing fourth of five candidates with 4.7% of the vote.

[10] She later criticised the party's campaign in the 1987 election, arguing it was too focused on Welsh-speaking areas in Wales.

[11] In 1986 she stood to be Chair of Plaid Cymru on a left-wing ticket, and lost to Dafydd Huws.