Troglohnia is a genus of Chinese spiders in the family Hahniidae.
Troglohnia is endemic to Guizhou and Yunnan provinces of China.
All described species were sampled from caves.
The genus name refers to its troglobiont (cave-dwelling) life style, combined with the ending of Hahnia.
The species are named after their respective type localities:
, this genus includes four species: