Rayamundanpatti is a village in the Thanjavur taluk of Thanjavur district, Tamil Nadu, India.

As per the 2001 census, Rayamundanpatti had a total population of 1413 with 711 males and 702 females. The sex ratio was 987. The literacy rate was 55.28.

• "Primary Census Abstract - Census 2001". Directorate of Census Operations-Tamil Nadu. Archived from the original on 6 August 2009.

10°46′N 78°54′E / 10.767°N 78.900°E / 10.767; 78.900