Guajiboan (also Guahiban, Wahívoan, Guahiboan) is a language family spoken in the Orinoco River region in eastern Colombia and southwestern Venezuela, a savanna region known as the Llanos.

Guajibo has the most speakers (over 23,000) and is the largest indigenous group in eastern Colombia.

Jolkesky (2016) notes that there are lexical similarities with the Yanomami, Arawak, Nadahup, Puinave-Kak, Bora-Muinane, and Choko language families due to contact.

[1]: 357–358 An automated computational analysis (ASJP 4) by Müller et al. (2013)[3] found that there are apparent lexical similarities with Yanomami and Ticuna-Yuri.

However, since the analysis was automatically generated, the similarities could be either due to mutual lexical borrowing, genetic inheritance, or chance resemblances.