[en] Experimental nuclear structure data from various reactions and decays have been evaluated for all known nuclides of mass 39 (Mg, Al, Si, P, S, Cl, Ar, K, Ca, Sc, Ti). Detailed evaluated nuclear structure information is presented for each reaction and decay and the best values combining all available data are recommended for level energies, half-lives, γ-ray energies and intensities, decay properties (energies, intensities and placement of radiations), and other spectroscopic data. The ³⁹K, ³⁹Ca and ³⁹Ar are the most extensively studied nuclides; no excited states are known in ³⁹Mg and ³⁹Ti. This work supersedes the earlier full evaluation of A=39 by B. Singh and J. Cameron (2006Si02).