| Þingeyjarsveit | |
| Settlement Type: | Municipality |
| Mapsize: | 250px |
| Pushpin Map: | Iceland |
| Subdivision Type: | Country |
| Subdivision Name: | Iceland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Northeastern Region |
| Subdivision Type2: | Constituency |
| Subdivision Name2: | Northeast Constituency |
| Leader Title1: | Council |
| Unit Pref: | Metric |
| Area Total Km2: | 12,021 |
| Population Total: | 1,393 |
| Population As Of: | 2023 |
| Population Density Km2: | 0.11 |
| Postal Code Type: | Postal code(s) |
| Postal Code: | 601, 641, 645, 650, 660 |
| Code1 Name: | Municipal number |
| Code1 Info: | 6613 |
Þingeyjarsveit (pronounced as /is/) is a municipality located in Iceland. The Vaglaskógur birch wood, one of Iceland's largest woods, is located in the municipality. The district school and sports centre can be found in Laugar. In 2022 the municipality merged with Skútustaðahreppur under its own name, making the municipality the largest in Iceland by area. [1] The municipality agreed to change their governance from a mayor to a council.[2]