| Maundadan Chetti | |
| State: | India |
| Region: | Nilgiris, Tamil Nadu |
| Speakers: | 5,400 |
| Date: | 2020 |
| Ref: | e25 |
| Familycolor: | Dravidian |
| Fam2: | Southern |
| Fam3: | Southern I |
| Fam4: | Tamil–Kannada |
| Fam5: | Kannada–Badaga |
| Fam6: | Kannadoid |
| Iso3: | cty |
| Glotto: | maun1243 |
| Glottoname: | Maundadan Chetti |
| Script: | speakers use Tamil script (majority) and Malayalam script |
Maundadan Chetti or Chetti is a Kannadoid Southern Dravidian language of India spoken by Maundadan Chetti community in the Nilgiri district of Tamil Nadu and in the Wayanad district of Kerala, India. Its highest lexical similarity is with Badaga, which one calculation put at 57%, and it has somewhat lower similarities (47% - 41%) with Kannada, Malayalam, Tamil and Wayanadan Chetti. The people have requested the Tamil Nadu government to recognize them as distinct.