挪亚区（英语：Noachis quadrangle）是美国地质调查局太空地质学研究计划（Astrogeology Research Program）对火星表面划分的30个区域之一，编号为MC-27。[1]
挪亚区覆盖了火星西经300°至360°、南纬30°至65°的区域。该区的撞击坑密度很高，是火星上最古老的地区之一。火星的挪亚纪（Noachian）便以此得名。
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