Dharmapuri is situated in the northwestern corner of Tamil Nadu and is bounded by Vytla Hills on the East, Nallampalli taluk on the South, Palacode taluk on the North and the Pennagaram taluk on the West. It is located between latitudes N 11 47’ and 12 33’ and longitudes E 77 02’ and 78 40’. The total geographical area of Dharmapuri district is 4497.77 km² which is 3.46% of Tamil Nadu.

 Dharmapuri was called Thahadoor when King Adhiyaman ruled the Kongu Nadu. Adhiyaman Kottai is available on salem highway. so many temples build in the period when Adhiyaman ruled. There is a subway from Adhiyaman kottai temple to Dharmapuri Kottai temple. Dharmapuri is located on one of the geographically important area in south India. It is 130 km away from Bangalore city and 300 km from State Capital Chennai. All the corporations in Tamilnadu except Thoothukudi and Tirunelveli lies within 300 km from Dharmapuri. Neighboring states cities like Bangalore, Mysore, Tumkur, Chittoor, Tirupathi, Thrissur, Palakkad, Puducherry also lie within a 300 km radius.