Guambiano
| Consonants | Bilabial | Alveolar | Post- alveolar | Retroflex | Palatal | Velar | Labio- velar | Glottal |
| Stop | p | t | k | kʷ | ʔ | |||
| Affricate | ts | tʃ | ʈʂ | |||||
| Fricative | s | ʃ ʒ | ʂ | |||||
| Nasal | m | n | ɲ | |||||
| Approximant | j | w | ||||||
| Tap, flap | ɾ | |||||||
| Lateral | l | ʎ |
| Vowels | Front | Central | Back |
| High | i | ɨ | |
| Mid | e | o | |
| Low | a |
Branks, Thomas and Judith Branks. 1973. Fonología del guambiano. Sistemas Fonológicos de Idiomas Colombianos: Tomo II. Bogota: Ministerio de Gobierno. 39-56.
Long, Violeta. 1985. Estudio de la lengua guambiano. University of St. Andrews Centre for Latin American Studies Working Paper 20. Larnaca, Cyprus.
Vásquez, Beatriz. 2000. Guambiano: algunos aspectos sobre morfología nominal. In María Stella González de Pérez and María Luisa Rodríguez de Montes (eds.), Lenguas indígenas de Colombia: Una visión descriptiva. Bogotá: Instituto Caro y Cuervo. 155-156.
Branch and Long posit /kʷ/ and /ʒ/, while Vásquez excludes these segments from the inventory. Vásquez also proposes /ə/ instead of /ɨ/, and /u/ instead of /o/. Long posits /ʔ/, which we include here due to its appearance in other Barbacoan languages.