Ruins of Kachari Rajbari are a set of medieval monuments located in Dimapur, Nagaland, in Northeast India.

Lieutenant Grange, then Assistant Political Agent to the colonial government in Assam, undertook his first expedition to the Naga Hills in 1840.

The gateway, Grange described, to be in a "tolerable state of preservation" but the inner passage or guard room had turned into "a heap of ruins.

"[1] In 1874, Major H. H. Godwin-Austen, from the Topographical Survey of India, describes the entrance gateway as "fine solid mass of masonry... the stone which are pierced to receive the hinges of double heavy door, are still in perfect preservation."

[3] Jae-Eun Shin (2020) points out that early colonial descriptions by successive British administrators fail to mention any clear trace of temples and images at the ruins.