Peadar Cowan (23 October 1903 – 9 May 1962) was an Irish politician. A solicitor by profession, he first stood unsuccessfully for election at the 1937 general election as a Labour Party candidate for the Meath–Westmeath constituency. He also stood unsuccessfully at the 1938, 1943 and 1944 general elections in the same constituency.
Cowan left the Labour party in 1944, disillusioned with the infighting and turmoil. In 1946 he joined the newly formed Clann na Poblachta, where he became the party's first treasurer. He was first elected to Dáil Éireann at the 1948 general election as a Clann na Poblachta Teachta Dála (TD) for the Dublin North–East constituency. He was re-elected at the 1951 general election as an independent TD, but lost his seat at the 1954 general election. He sided with Noel Browne over the mother and child scheme and stood again as an Independent candidate at the 1951 general election where he retained his seat until he was defeated in 1954.