마오난어의 자음은 총 36개이다
| bilabial | stop | b p p_h ͫb |
| bilabial | nasal | m |
| labiodental | non-sibilant fricative | f v |
| alveolar | stop | d t |
| alveolar | sibilant fricative | s z |
| alveolar | nasal | n |
| alveolar | lateral approximant | l |
| alveolar | trill | r |
| retroflex | sibilant affricate | dʐ tʂ |
| retroflex | sibilant fricative | ʂ |
| palato-alveolar | sibilant affricate | dʒ tʃ |
| palato-alveolar | sibilant fricative | ʃ |
| palatal | approximant | j |
| velar | stop | g k |
| velar | nasal | ŋ |
| velar | non-sibilant fricative | x ɣ |
| uvular | stop | ɢ q |
| uvular | non-sibilant fricative | χ ʁ |
| glottal | fricative | h |