Single crystals of BaS have been grown and irradiated with neutrons, producing an intense F-center spectrum with a spectroscopic splitting factor, g=1.9637+/-0.0005. The isotropic part of the hyperfine interaction A is 41.0+/-0.2 and 36.4+/-0.2 G for the nearest-neighbor 137Ba and 135Ba nuclei, respectively. The dipolar hyperfine interaction constants B are found to be 4.0+/-0.1 and 3.8+/-0.1 G, respectively, for the same nuclei. F centers were also observed in samples which had been crushed or γ-irradiated following deformation. Other damage centers were observed with less intensity than the F center and are briefly discussed.