| kcb | kawa1276 | Kawacha | A,
N,
Wojokesic | 106 |
| klp | kama1360 | Kamasa | A,
N,
W,
Kamasa-Susuami | 99 |
| kvg | kuni1265 | Kuni-Boazi | A,
M,
Boazi | 265 |
| kvg | kuni1265 | Kuni-Boazi (Boazi Dialect) | A,
M,
Boazi | 49 |
| kvg | kuni1265 | Kuni-Boazi (Kuini Dialect) | A,
M,
Boazi | 4 |
| kjr | kuru1305 | Kurudu | A,
M,
E,
S,
C,
Y,
Eastern Yapen | 41 |
| kwh | kowi1239 | Kowiai | A,
M,
G,
B,
S,
Geser-Gorom-Bati | 8 |
| khs | kasu1251 | Kasua | B,
Bosavi Watershed | 188 |
| bco | kalu1248 | Kaluli (Bosavi Dialect) | B,
B,
Kaluli-Sunia | 35 |
| bco | kalu1248 | Kaluli | B,
B,
Kaluli-Sunia | 200 |
| khh | kehu1238 | Keuw | East Geelvink Bay | 290 |
| kxw | kona1242 | Konai | East Strickland | 100 |
| jko | kubo1242 | Kubo | E,
Kubo-Samo-Bibo | 248 |
| xeu | keor1235 | Keoru-Ahia | E,
Western Eleman | 103 |
| xeu | ahea1235 | Keoru-Ahia (Aheave Dialect) | E,
W,
Keoru-Ahia | 104 |
| kwe | nucl1595 | Kwerba | G,
K,
Kwerbaic | 41 |
| kwe | nucl1595 | Kwerba (Airmati Dialect) | G,
K,
Kwerbaic | 38 |
| xau | kauw1242 | Kauwera | G,
K,
Kwerbaic | 40 |
| kol | kolp1236 | Kol | Isolate | 219 |
| xla | kamu1260 | Kamula | Kamula-Elevala | 205 |
| khp | kapo1250 | Kapauri | K,
Kapore | 38 |
| kiq | kosa1251 | Kosare | Kaure-Kosare | 98 |
| bpp | kaur1271 | Kaure | Kaure-Kosare | 327 |
| kyt | kaya1328 | Kayagar | K,
Kaygir-Tamagario | 128 |
| kxz | kere1286 | Kerewo | K,
Turama-Kerewo | 101 |
| kqi | koit1244 | Koitabu | K,
K,
Koita-Koiari | 176 |
| kig | kima1246 | Kimaghima | K,
Kimaama-Riantana | 45 |
| knd | kond1303 | Konda | Konda-Yahadian | 40 |
| tcq | kaiy1239 | Kaiy | L,
T,
E,
Doutai-Kai-Waritai | 235 |
| kkb | kwer1264 | Kwerisa | L,
T,
E,
Doutai-Kai-Waritai | 37 |
| kiy | kiri1256 | Kirikiri | L,
T,
W,
Fayu-Kirikiri | 238 |
| kiy | faia1238 | Kirikiri (Faia Dialect) | L,
T,
W,
F,
Kirikiri | 124 |
| kto | kuot1243 | Kuot | Language isolate | 293 |
| xop | kopa1248 | Kopar (Singarin Dialect) | L,
Nor | 225 |
| xop | kopa1248 | Kopar | L,
Nor | 102 |
| kgw | karo1303 | Karon Dori | Maybrat-Karon | 80 |
| kdw | kone1241 | Koneraw | Mombum-Koneraw | 37 |
| kmt | kemt1242 | Kemtuik | N,
O,
M,
Gresi-Kemtuik | 40 |
| kgq | kamo1255 | Kamoro | N,
A,
Asmat-Kamoro | 94 |
| irx | kamb1302 | Kamberau | N,
A,
A,
Sabakor | 40 |
| tyn | komb1274 | Kombai | N,
A,
A,
G,
A,
Ndeiram | 71 |
| khe | koro1312 | Korowai | N,
A,
A,
G,
Becking-Dawi | 206 |
| kzv | komy1238 | Komyandaret | N,
A,
A,
G,
B,
Tsakwambo-Komyandaret | 211 |
| kue | kuma1280 | Kuman | N,
C,
S,
N,
Kuman-Dom-Gunaa | 258 |
| kyc | kyak1244 | Kyaka | N,
E,
Engan | 116 |
| skm | saka1292 | Kutong (Sakam Dialect) | N,
F,
F,
U,
Sakam-Som | 56 |
| kqb | kova1243 | Kovai | N,
F,
H,
E,
Trans Vitiaz | 40 |
| kmg | kate1253 | Kâte | N,
F,
H,
E,
T,
H,
Kate-Mape | 140 |
| kmg | mago1249 | Kâte (Mâgobineng Dialect) | N,
F,
H,
E,
T,
H,
K,
Kâte | 54 |
| kmg | wamo1241 | Kâte (Wâmora Dialect) | N,
F,
H,
E,
T,
H,
K,
Kâte | 56 |
