| Conventional Long Name: | Athmallik State |
| Common Name: | Athmallik |
| Nation: | British India |
| Subdivision: | Vassal state of Maratha Confederacy (1785 - 1803) Princely State |
| Year Start: | 1785 |
| Year End: | 1948 |
| Event End: | Accession to the Union of India |
| Event1: | Jagir recognized as a state |
| S1: | India |
| Flag S1: | Flag of India.svg |
| Image Map Caption: | Athmallik State in the Imperial Gazetteer of India |
| Capital: | Kaintaragarh |
| Today: | Angul, Odisha |
Athmallik State was one of the princely states of India during the period of the British Raj. The state was a former jagir recognized as a state in 1874 and had its capital in Kaintaragarh near the town of Athmallik.[1] Its last ruler Kishore Chandra Deo signed the accession to the Indian Union in 1948.