Recent spectroscopic and chemical kinetic studies have provided sufficient data for construction of reliable thermodynamic tables for both dioxygen difluoride (O2F2; Chemical Abstracts Registry Number, 7783‐44‐0) and dioxygen fluoride (O2F; Chemical Abstracts Registry Number, 15499‐23‐7). This paper contains those tables for these species in both SI units (0.1 MPa standard state) and cal K mol units (1.0 atm standard state). The experimental basis includes three recent assignments of the fundamental vibrational frequencies for O2F2, a new set of rotational constants for O2F, an enthalpy change for dissociation of O2F, and an updated standard enthalpy of formation for O2F2.