Robert P. Farnan (1898 – 7 January 1962) was a gynaecologist, farmer, and Senator from County Kildare in Ireland. He was born at Batton, Castlemore, County Kildare and was educated at CBS Athy, Castleknock College and at the Royal University of Ireland. Farnan was Professor of midwifery in University College Dublin, and became first chairperson of the Medical Research Council of Ireland upon its establishment in 1937. He was also a gynaecologist to the Mater Hospital. He was successful and wealthy, owning houses in Merrion Square and Howth, a Cadillac and a Rolls-Royce, as well as Bolton Castle, a tower house and farm in Kildare, where he bred Aberdeen Angus bulls.