| ksj | uare1241 | Uare | T,
S,
Kwalean | 421 |
| ufi | ufim1240 | Ufim | T,
F,
F,
Gusap-Mot | 51 |
| ukg | ukur1240 | Ukuriguma | T,
M,
C,
P,
Numugenan | 354 |
| mtg | unaa1239 | Una | T,
M,
Eastern | 12 |
| | Unknown (possibly Konomala) | | 138 |
| uro | urap1240 | Ura | E,
Baining | 505 |
| urt | urat1244 | Urat | T,
W,
Urat | 40 |
| uvh | urii1240 | Uri | T,
F,
F,
Erap | 53 |
| uvh | urii1240 | Uri (Siara Dialect) | T,
F,
F,
Erap | 90 |
| uvh | urii1240 | Uri (Sintogoro Dialect) | T,
F,
F,
Erap | 89 |
| urg | urig1240 | Urigina | T,
M,
R,
Peka | 354 |
| uri | urim1252 | Urim | T,
Urim | 46 |
| urn | urua1244 | Uruangnirin | A,
M,
C,
North Bomberai | 4 |
| wnu | usan1239 | Usan | T,
M,
C,
P,
Numugenan | 345 |
| ulf | usku1243 | Usku | Unclassified | 116 |
| omo | utar1238 | Utarmbung | T,
M,
S,
J,
Osum | 338 |
| utu | utuu1240 | Utu | T,
M,
C,
Hanseman | 359 |
| usu | uyaa1238 | Uya | T,
M,
R,
Nuru | 350 |
| duk | dudu1240 | Uyajitaya (Subalulu Dialect) | T,
M,
R,
Nuru | 121 |
| duk | dudu1240 | Uyajitaya | T,
M,
R,
Nuru | 351 |
| duk | dudu1240 | Uyajitaya (Gisi Dialect) | T,
M,
R,
Nuru | 124 |
| duk | dudu1240 | Uyajitaya (Didiwala Dialect) | T,
M,
R,
Nuru | 120 |
| duk | dudu1240 | Uyajitaya (Udibai Dialect) | T,
M,
R,
Nuru | 120 |
| duk | dudu1240 | Uyajitaya (Palipa Dialect) | T,
M,
R,
Nuru | 120 |
| duk | dudu1240 | Uyajitaya (Uya Dialect) | T,
M,
R,
Nuru | 120 |
