The topography of Dhamtari city is primarily a flat alluvial plain, averaging an elevation of 317 metres above sea level. This flat terrain is highly conducive to intensive agriculture. However, the broader district transitions from these plains to hilly, forested terrain as one moves southward toward the Sihawa range.
The landscape is dramatically shaped by human engineering in the form of massive reservoirs. The Gangrel Dam creates a massive artificial lake that alters the local topography, creating coastal-like environments along its edges. Other notable topographical alterations include the Murrumsilli Dam, Dudhawa Dam, and Madamilli Dam, which control the flow of the Mahanadi and its tributaries through the district's valleys.