Rangunia Upazila is located in between 22°18' and 22°37' north latitudes and in between 91°58' and 92°08' east longitudes.

Chakma King Harish Chandra transferred his capital from Rajanagar of Rangunia to Rangamati in 1874.

[5] Upazila health complex 1, family planning centre 11, satellite clinic 2.

In 1971, encounters were held between the freedom fighters and the Pak army at Ranirhat, Rowajarhat and Rangunia.

The Pak army conducted looting, burning, rape and mass killing in various places of the upazila.