Ryongrim County is a kun, or county, in southeastern Chagang Province, North Korea. It borders Rangrim, Changjin, Chŏnch'ŏn, Tongsin, Taehŭng, and Sŏnggan counties. The county is mainly alpine territory. It contains many mountain peaks, such as Wagalbong (2,260m), Ch'ŏnŭimulsan (2,032m), Rangrimsan (2,186m), Milpuldŏksan (1,577m), Ungŏsusan (2,020m), Tomabong (1,525m), Paktalsan (1,817m), Taedasan (1,463m), and Sonamsan (1,178m).
In the standard dialect of South Korea, Ryongrim loses its initial 'r' both in pronunciation and spelling.