| Mazaltepec Zapotec | |
| Also Known As: | (Santo Tomás Mazaltepec) |
| State: | Mexico |
| Region: | Oaxaca |
| Speakers: | 2,200 |
| Date: | 1990 census |
| Ref: | e18 |
| Familycolor: | American |
| Fam1: | Oto-Manguean |
| Fam2: | Zapotecan |
| Fam3: | Zapotec |
| Iso3: | zpy |
| Glotto: | maza1294 |
| Glottorefname: | Mazaltepec Zapotec |
Mazaltepec Zapotec, also known as Etla Zapotec, is a divergent Zapotec language of the Mexican state of Oaxaca. It stands apart from other varieties of Zapotec; it has only 10% intelligibility with San Juan Guelavía Zapotec (at least with some varieties, as that may not be a single language), but zero intelligibility with other varieties of Zapotec that have been tested. The moribund Tejalapan Zapotec may be closer.