Busia is inhabited by the Luhya tribe of Kenya and the Teso of Kenya, and small groups of the Luo. The Luhya communities include the Abakhayo, Marachi, Samia and Abanyala communities.
Busia county has a total population of 893,681 persons, of this 426,252 are females, 467,401 are male 28 Intersex person. The county has a population density of 527 persons with an average household size of 4.5 persons.