| 230681 | Kol | 'ma:na | | | SIL (1981) | |
| 21997 | Kokoda (Tarof Dialect) | nigei | | | Voorhoeve (1975) | |
| 22037 | Kokoda (Kasuweri Dialect) | nigei | | | Voorhoeve (1975) | |
| 15076 | Koitabu | maɣe | good | | Dutton (2010) | |
| 196091 | Kobon | ayc | - | | Pawley (2013) | |
| 196094 | Kobon | mel | - | | Pawley (2013) | |
| 196093 | Kobon | gib | - | | Pawley (2013) | |
| 164940 | Kobon | aint̮ɕ | | | Davies and Comrie (1985) | good |
| 196092 | Kobon | ec | - | | Pawley (2013) | |
| 143945 | Kobol | berey | | | Z'graggen (1980) | good |
| 35057 | Klon (Probur Dialect) | nɔk | | | Stokhof (1975) | |
| 35176 | Klon (Halerman Dialect) | mʋn'ɔk | | | Stokhof (1975) | |
| 77480 | Klon | entmai | | | Baird (2008) | |
| 77479 | Klon | tmai | | | Baird (2008) | |
| 77495 | Klon | nok | | | Baird (2008) | |
| 220723 | Kirikiri | naudi | | | Clouse (1997) | |
| 237252 | Kire | vuŋ | | | Foley (2005) | |
| 19752 | Kimaghima | kuci | | | Voorhoeve (1975) | |
| 6443 | Kibiri | oparo | | | Wurm (1973) | |
| 33277 | Keuw | tée-nô | | | Kamholz (2012) | |
| 33630 | Ketengban | teleb | | | Heeschen (1978) | |
| 180969 | Kesawai | nogono | | | Z'graggen (1980) | good |
| 180970 | Kesawai | sihi | | | Z'graggen (1980) | good |
| 6856 | Kerewo | meha | | | Wurm (1973) | |
| 4127 | Keoru-Ahia | veveke | | | Brown (1973) | |
| 4337 | Keoru-Ahia (Aheave Dialect) | eveke | | | Brown (1973) | |
| 25906 | Kemtuik | swey | | | Voorhoeve (1975) | |
| 21837 | Kemberano | niŋge | | | Voorhoeve (1975) | |
| 125051 | Kein | naliu | | | Z'graggen (1980) | good |
| 236929 | Kayan | yaoŋ | | | Foley (2005) | |
| 29219 | Kayagar | naimap | | | Voorhoeve (1971) | |
| 20601 | Kayagar | naimap | | | Voorhoeve (1975) | |
| 17488 | Kawacha | no'nya | | | Lloyd (1973) | |
| 22565 | Kauwera | ezamas | | | Voorhoeve (1975) | |
| 220734 | Kaure | aɾuɛ | | | Clouse (1997) | |
| 29403 | Kaure | sepa | | | Voorhoeve (1971) | |
| 19430 | Kaure | arue | | | Voorhoeve (1975) | |
| 91100 | Kâte | biaŋne | good | | McElhanon (1967) | good |
| 2032 | Kasua | naporapo | | | Franklin and Voorhoeve (1973) | |
| 16431 | Kasua | nʌpɔľɔ | | | Shaw (1986) | |
| 23601 | Karon Dori | mof | | | Voorhoeve (1975) | |
| 34463 | Karon Dori | mof | | | Miedema & Welling (1985) | |
| 125048 | Kare | kɛsa | | | Z'graggen (1980) | good |
| 244382 | Karawa | məta | | | Laycock (1968) | |
| 21757 | Karas | bes | | | Voorhoeve (1975) | |
| 19552 | Kapauri | kusi | | | Voorhoeve (1975) | |
| 21042 | Kanum | nemeye | | | Voorhoeve (1975) | |
| 237250 | Kanggape | yara | | | Foley (2005) | |
| 27362 | Kamula | tɛgɛdřɛ | | | Reesink (1976) | |
| 16531 | Kamula | tegedřɛ | | | Shaw (1986) | |
