[en] Experimental nuclear structure and decay data for nuclides of mass A = 190 have been evaluated. This work supersedes the previous evaluation by M. R. Schmorak, published in Nuclear Data Sheets 9, 401 (1973). Because of the new experimental results which are incorporated, the present evaluation involves a complete revision of the level structure every mass--190 nuclide except ¹⁹⁰Ir. It covers significant new results not included in the recent evaluation by R. E. Doebler and E. Browne (Table of Isotopes, 7th Edition, ed. by C. M. Lederer and V. S. Shirley, p. 1213ff, John Wiley and Sons, Inc. (1978) for the following nuclides and reactions or decay schemes: ¹⁹⁰Os from ¹⁸⁹Os(n, γ) and Coulomb excitation; ¹⁹⁰Pt from (HI,xnγ) reactions and ¹⁹²Pt(p, t); ¹⁹⁰Au from ¹⁹¹Ir(α, 5nγ); ¹⁹⁰Hg from (HI,xnγ) reactions; ¹⁹⁰TI from ¹⁹⁰Pb epsilon-c decay; ¹⁹⁰Pb from ¹⁵⁴Gd(⁴⁰Ar, 4nγ). Of the nuclei readily studied by nuclear reactions, little is presently known of the odd--odd ¹⁹⁰Ir, and there are only sketchy, preliminary data on high--spin states of ¹⁹⁰AU, which is expected to have a low--lying 11-- isomer whose decay has not been observed. A recent measurement of the g--factor for the 24.1--ns isomer in ¹⁹⁰Hg suggests strongly that this state decays by an unobserved transition, whose existence requires confirmation