| Idon | |
| Nativename: | Ajiya |
| Region: | Kaduna State |
| States: | Nigeria |
| Speakers: | 5,000 |
| Date: | 2011 |
| Ref: | e18 |
| Familycolor: | Niger-Congo |
| Fam2: | Atlantic–Congo |
| Fam3: | Benue–Congo |
| Fam4: | Plateau |
| Fam5: | Central ? |
| Fam6: | North Plateau ? |
| Iso3: | idc |
| Glotto: | idon1238 |
| Glottorefname: | Idon |
Idon (Idong), or Ajiya, is a Plateau language of Nigeria.