마오난어의 자음은 총 36개이다
| bilabial | stop | b p p_h pj p_hj ͫ b bj ͫ bj |
| bilabial | nasal | m ˀm mj |
| labiodental | non-sibilant fricative | f v fj vj |
| alveolar | stop | tw d ᶯd t t_h tj t_hj dw dj ⁿdj |
| alveolar | sibilant fricative | s z zj sw |
| alveolar | nasal | n ˀn nj |
| alveolar | lateral approximant | l lw lj |
| alveolar | affricate | ts ts_h tsw ts_hw tsj ts_hj |
| glottal | fricative | h ɦ |
| velar | plosive | k k_h kw k_hw |
| palatal | plosive | c c_h cw |
| palatal | approximant | j jw ˀj |
| velar | nasal | ŋ ŋw |
| Labialized velar | fricative | w ˀw |
| palatal | fricative | ɕ ɕw |
| velar | stop | ᵑg ᵑgw |
| retroflex | nasal | ɳ̊ ˀɳ̊ ɳ̊ɖ̥ |
| glottal | stop | ʔ |
| retroflex | stop | ɖ̥ |