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Studies of the ¹⁸O(¹⁸O, ¹⁷F)¹⁹N and ²⁰⁸Pb(¹⁸O, ²⁰⁷Bi)¹⁹N reactions at E(¹⁸O) = 91 and 93 MeV, respectively, lead to values of the atomic mass excess of ¹⁹N of 15.856 ± 0.050 (NA82) and 15.96 ± 0.15 MeV (BA79AA). The adopted value is 15.866 ± 0.048 MeV. ¹⁹N is then stable with respect to decay into ¹⁸N + n by 5.45 MeV. Differential cross sections for the two reactions in which ¹⁹N has been observed are ~ 500 nb/sr (6°) (NA82) and ~ 120 nb/sr (85°) (BA79AA). In addition to the ground-state transition, (NA82) report the population of states at E_x = 1.12 ± 0.04 and 1.59 ± 0.04 MeV. See also (AL80H, NA80J) and (78AJ03).