The 1966 version of Nuclear Data Sheets for A = 79 has been revised on the basis of experimental data received prior to December 1, 1974. Information from approximately 85 papers and communications has been included in the present evaluation. Data on eight A = 79 nuclei are presented. The half-life and decay energy for 79Ga have been proposed, but the compilers do not regard the nuclidic assignment as firmly established. The existence of two isomers in 79Ge has recently been proposed. The compilers tentatively assign a 42-s activity to the 79Ge ground state, and a partial decay scheme is given. The compilers do not regard the assignment of a 19.1-s activity to 79Ge as firmly established. The spin of the 79As ground state is known from its decay to levels in 79Se. Many levels from 79Se are known from 79As decay, single-nucleon transfer, and a level scheme for 78Se(th n, γ) proposed by the compilers. Only an upper limit for the half-life of long-lived 79Se has been determined; this nucleus decays directly to the 79Br ground state. Levels in stable 79Br up to 2 MeV are known from 79Kr decay, Coulomb excitation and resonance fluorescence, and (n,n' γ). Most of the information on excited levels in 79Kr is regarded by the compilers as tentative, since the 79Rb decay scheme is not well established and all reaction studies are unpublished. Only the ground state of 79Rb is known, and its spin cannot be determined since the intensity of the decay to the 79Kr ground state is not accurately known. The compilers tentatively assign as 8.1-m activity to the 79Sr ground state, but no decay scheme has been proposed. The compilers regard the assignment of a 4.4-m activity to 79Sr as not firmly established. The only data on excited levels of 79Sr are unpublished.