The Karenni States, also known as Red Karen States, was the name formerly given to the states inhabited mainly by the Red Karen, in the area of present-day Kayah State, eastern Burma. They were located south of the Federated Shan States and east of British Burma.

Kayah State, or Karenni State, is a state of Myanmar. Situated in eastern Myanmar, it is bounded on the north by Shan State, on the east by Thailand's Mae Hong Son Province, and on the south and west by Kayin State. It lies approximately between 18° 30′ and 19° 55′ north latitude and between 96° 50′ and 97° 50′ east longitude. The area is 11,670 km2 (4,510 sq mi). Its capital is Loikaw. The estimated population in the 2014 Myanmar Census was 286,738, the smallest among Myanmar's seven states. It is inhabited primarily by the Karenni ethnic group, also known as Red Karen or Kayah, a Sino-Tibetan people.