| Tuapeijat | |
| Native Name Lang: | id |
| Settlement Type: | Town |
| Pushpin Map: | Indonesia Sumatra |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Regency |
| Subdivision Name2: | Mentawai Islands |
| Subdivision Type3: | Subdistrict |
| Subdivision Name3: | North Sipore |
| Unit Pref: | Metric |
| Area Footnotes: | [1] |
| Area Total Km2: | 126.06 |
| Population As Of: | 2015 estimate |
| Population Total: | 5756 |
| Population Density Km2: | auto |
| Timezone1: | UTC+7 (Western Indonesia Time) |
| Postal Code: | 25392 |
Tuapeijat (also spelled Tuapejat or Tua Pejat) is a town within North Sipora District (Kecamatan Sipora Utara) in the Mentawai Islands Regency of West Sumatra province of Indonesia and it is the administrative seat (capital) of Mentawai Islands Regency. The population was 4,344 at the 2010 Census, and the 2015 estimate gave the population as 5,756. The town's jurisdiction includes three small islands of Siburu, Silabok and Pototoga in addition to the main town areas on Sipora Island.
Tuapejat has a tropical rainforest climate (Af) with heavy to very heavy rainfall year-round.