Beyza County () is a county in Fars Province, Iran. At the 2006 census, its population was 36,694, in 8,565 families. The county has one city: Beyza. The county has three rural districts ("dehestan"): Banesh Rural District, Beyza Rural District, and Kushk-e Hezar Rural District. The Beyza County was established on 2018 in Fars province.