Kuuk Thaayorre (Thayore) is a Paman language spoken in the settlement Pormpuraaw on the western part of the Cape York Peninsula, Queensland in Australia by the Thaayorre people. As of 2006, 250 of the 350 ethnic Thaayorre spoke the language. It is in a robust position compared to many indigenous Australian languages, as it is still being acquired by children and used in daily interaction.

It is closely related to the Ogh-Undjan and more distantly related to the Uw languages, Uw Olkola. Kuuk Yak is either a dialect or closely related.

Speakers of the Kuuk Thaayorre language are able to recall the names of a couple of dialects, such as Kuuk Thaayunth, Kuuk Thayem and Kuuk Thanon, but today there is only little dialectal difference and the language has become more uniform as the number of speakers has gone down. The so-called Kuuk Yak language may be a dialect of Kuuk Thaayorre, but may be a closely related language as well. Barry Alpher is currently trying to document the language in order to understand its genetic affiliation.

As with many other Australian languages, there is a long list of alternative spellings of Kuuk Thaayorre. The name itself, Kuuk Thaayorre, means 'the Thaayorre language' in the language itself, kuuk meaning 'language' and Thaayorre being their ethnonym.

Other names include Kuuk Thaayoore, Kuktayor, Kukudayore, Gugudayor, Koko Daiyuri, Koko Taiyor, Kokkotaijari, Kokotaiyari, Thayorre, Thaayore, Thayore, Tayore, Taior, Taiol, Da:jor and Behran.

Kuuk Thaayorre has five vowels:

All of the vowels above have a long counterpart. In addition, one of the rhotics may be syllabic.

Kuuk Thaayorre has 16 consonants: