Seniyanallur is a village in Cheyyar tehsil in district of Tiruvannamalai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Seniyanallur was 373 which includes 183 males and 190 females. Seniyanallur covers 64.37 ha area. Pincode of Seniyanallur is 631702.