Rangkayo is a genus of spiders in the family Thomisidae.
Rangkayo is only known from Sumatra, Indonesia.
The genus and R. hitam are named after Orang Kayo Hitam (Rangkayo), a king involved in the founding of Jambi City. R. perkaso is derived from the Jambi Malay "perkaso" (powerful), taken from a poem about Rangkayo Hitam.
, this genus includes two species: