| Honorific-Prefix: | Sir |
| Purniah Narsinga Rao Krishnamurti | |
| Honorific-Suffix: | CIE KCIE |
| Order1: | 16th Dewan of Mysore |
| Term Start1: | 1901 |
| Term End1: | 1906 |
| Predecessor1: | T. R. A. Thumboo Chetty |
| Successor1: | V. P. Madhava Rao |
| Monarch1: | Krishna Raja Wadiyar IV |
| Birth Date: | 1849 8, df=yes |
| Birth Place: | Mysore kingdom |
| Profession: | Lawyer, civil servant |
Sir Purniah Narasinga Rao Krishnamurti, KCIE (12 August 1849 – 1911) was an Indian lawyer and administrator who served as the 16th Dewan of Mysore from 1901 to 1906.[1] He was a direct descendant of Purnaiah, the first dewan of Mysore.[2]
Krishnamurti was born on 12 August 1849 in the Kingdom of Mysore and was educated at Bangalore. He graduated in law from the University of Madras and joined Mysore Civil Service as Assistant Superintendent in 1870 during Mysore Commission. After the restoration of the throne to the Wadiyar dynasty, Krishnamurti served as a judge of the Chief Court of Mysore before being appointed Dewan in 1901. On 3 August 1905, whilst he was dewan, public electric lighting was introduced in Bangalore, becoming the first city in India to get electric street lighting. He was also the fifth Jagirdar of Yelandur estate.
He had two children, one of whom survived to adulthood.
In 1897, Krishnamurti was made a Companion of the Order of the Indian Empire (CIE). He was promoted to Knight Commander of the Order of the Indian Empire in the 1903 Durbar Honours.[3]
Krishnamurthypuram, a locality in Mysore, is named after him.