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The mineral composition of Nigella sativa seeds, physicochemical properties and fatty acid contents of the seed oil were evaluated using standard analytical methods. The mineral composition of Nigella sativa seeds are; K (1642.54 mg/100g), Ca (917.43 mg/100g), Na (159.28 mg/100g), Mg ((341.81 mg/100g), Zn (4.64 mg/100g), P (483.23 mg/100g) Cu (0.75 mg/100g), Fe (58.25 mg/100g) The results suggested that N. sativa is rich in mineral content with potassium (K) being the most abundant element while copper (Cu) was the least abundant in the samples. The fatty acids compositions of N. sativa showed that seed oil contained unsaturated fatty acids (81.65%) and saturated fatty acid (19.27%) with the major constituent of black seed (N. sativa) oil being linolenic acid, thus making it more nutritionally important. The physicochemical properties results of N. sativa seed oil were: acid value (2.02 mgKOH/g), peroxide value (8.10 mg/g), iodine value (112.40 mgI2/g), saponification value (212.80 mgKOH/g), refractive index (1.422 at 40 0C) and specific gravity (0.627 at 40 0C). The results in this study indicated that the oils of N. sativa seed might be useful for domestic consumption as well as industrial applications. Keywords: Nigella sativa, oil seed, physicochemical properties, nutritional, Gas Chromatography, fatty acid.