Kottamadagu is a village in Denkanikottai tehsil in district of Krishnagiri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kottamadagu was 1,521 which includes 804 males and 717 females. Kottamadagu covers 748.59 ha area. Pincode of Kottamadagu is 635118.