Unniyur is a village in Thottiyam tehsil in district of Tiruchirappalli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Unniyur was 2,460 which includes 1,218 males and 1,242 females. Unniyur covers 598.84 ha area. Pincode of Unniyur is 621207.