| Official Name: | Eastern Switzerland |
| Native Name: | Ostschweiz Suisse orientale Svizra orientala Svizzera orientale |
| Settlement Type: | Region |
| Subdivision Type: | Country |
| Area Total Km2: | 11521.0 |
| Area Footnotes: | [1] |
| Population As Of: | 2007 |
| Population Total: | 1069600 |
| Population Footnotes: | [2] |
| Population Density Km2: | auto |
| Blank Name Sec1: | NUTS code |
| Blank Info Sec1: | CH05 |
| Blank Name Sec2: | HDI (2018) |
| Blank Info Sec2: | 0.923[3] · 7th |
Eastern Switzerland (German: Ostschweiz, French: Suisse orientale, Romansh: Svizra orientala, Italian: Svizzera orientale) is the common name of the region situated to the east of Glarus Alps, with the cantons of Schaffhausen, Thurgau, St. Gallen, Appenzell Ausserrhoden, Appenzell Innerrhoden, and Glarus. The north of canton of Graubünden (with the city of Chur) is usually considered to be part of Eastern Switzerland as well.
Eastern Switzerland is also defined as one of the NUTS-2 regions of Switzerland. In this case, it includes the cantons of Appenzell Ausserrhoden, Appenzell Innerrhoden, Glarus, Graubünden, Schaffhausen, St. Gallen, and Thurgau.