| Native Name: | Bezirk Mattersburg |
| Native Name Lang: | de |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Burgenland |
| Subdivision Type2: | Number of municipalities |
| Subdivision Name2: | 19 |
| Unit Pref: | Metric |
| Area Total Km2: | 238.85 |
| Population Total: | 40593 |
| Population As Of: | 2022 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01:00 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +02:00 |
| Area Code Type: | Telephone prefix |
| Blank Name Sec1: | NUTS code |
| Blank Info Sec1: | AT112 |
Bezirk Mattersburg (Croatian: Kotar Matrštof, Hungarian: Nagymartoni járás) is a district of the state of Burgenland in Austria.
Towns (Städte) are indicated in boldface; market towns (Marktgemeinden) in italics; suburbs, hamlets and other subdivisions of a municipality are indicated in small characters.Where appropriate, the Croatian names are given in parentheses.