The photo-fission yields and photo-neutron cross-sections of (γ, 3n) and (γ, 4n) on ²⁰⁹Bi induced by 50 and 65MeV bremsstrahlung have been measured by using a recoil catcher and an off-line γ-ray spectrometric technique. The mass-yield distribution of fission products in ²⁰⁹Bi induced by bremsstrahlung photons from the present work and literature data in the energy range 28–85MeV is symmetric around 103 mass units. However, the full width at half maximum of the yields distribution increases from 19 mass units at 28–40MeV to 23 mass units at 85MeV. The (γ, 3n) reaction cross-section in the 50MeV and the (γ, 4n) reaction cross-section in the 50 and 65MeV bremsstrahlung-induced reaction of ²⁰⁹Bi were determined for the first time.