Rathdowney or Rathdowny (Irish: Ráth Domhnaigh) is a town in southwest County Laois, Ireland. It lies some 32 km southwest of Portlaoise in the Irish Midlands, at the point where the R433 regional road from Abbeyleix to Templemore is crossed by the R435 from Borris-in-Ossory to Johnstown.