This paper presents a description of the noun class system in the understudied Kordofanian language Moro. The authors identify a set of class prefixes and concord consonants which comprise the noun class system and list semantic regularities when present. Vowel-initial nouns present analytic difficulties, as some vowels in initial syllables undergo reduction and deletion. The authors conclude that there are (1) vowel prefixes and (2) vowel-initial stems for which the original consonant in the singular class prefix has been lost diachronically.