| Pa Di | |
| States: | China, Vietnam |
| Speakers: | 1,300 |
| Date: | no date |
| Ref: | e15 |
| Familycolor: | Tai–Kadai |
| Fam2: | Tai |
| Fam3: | Southwestern (Thai) |
| Fam4: | ? |
| Iso3: | pdi |
| Glotto: | padi1241 |
| Glottorefname: | Pa Di |
Pa Di pronounced as /[pa31 zi31]/ is a Southwestern Tai language of the Chinese–Vietnamese border. There are about 300 Pa Di speakers in Muong Khuong District, Lao Cai Province, Vietnam, who are classified as ethnic Tày by the Vietnamese government.[1] Pa Di tonal splits are similar to those of Standard Thai.
Jerold Edmondson[1] reports about 300 speakers. However, Bùi Quốc Khánh (2013) reports 3,000 Pa Dí people living in 19 natural villages in Mường Khương, Tung Trung Phố, and Nậm Chảy communes of Mường Khương District.