| Odu | |
| Nativename: | Ơ Đu |
| States: | Vietnam, Laos |
| Ethnicity: | O Du people |
| Speakers: | 950 |
| Date: | 1999 & 2005 censuses |
| Ref: | e18 |
| Familycolor: | Austro-Asiatic |
| Fam2: | Khmuic |
| Iso3: | tyh |
| Glotto: | oduu1239 |
| Glottorefname: | O'du |
Odu (Ơ Đu), or Iduh, is a Mon–Khmer language of Vietnam and Laos. Once spoken by about 300 people in Tương Dương district, Nghệ An province, Vietnam (Đặng, et al. 2010), it is now considered to be almost extinct.