| Cassilândia | |
| Settlement Type: | Municipality |
| Official Name: | The Municipality of Cassilândia |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Central-West |
| Leader Title: | Mayor |
| Leader Name: | José Donizete (PT) |
| Established Date: | 2009 |
| Area Total Km2: | 3649.83 |
| Area Total Sq Mi: | 2267.899 |
| Population As Of: | 2020 [1] |
| Population Total: | 22,002 |
| Population Density Km2: | 5.9 |
| Population Density Sq Mi: | 3.6 |
| Timezone: | AMT |
| Utc Offset: | -4 |
| Coordinates: | -19.1128°N -51.7339°W |
| Elevation M: | 470 |
| Elevation Ft: | 1.542 |
| Postal Code Type: | Postal Code |
| Postal Code: | 59540-000 |
| Website: | Cassilândia, Mato Grosso do Sul |
| Blank Name: | HDI (PNUD/2000) |
| Blank Info: | 0.775 – medium |
Cassilândia is a municipality located in the Brazilian state of Mato Grosso do Sul. Its population was 22,002 (2020) and its area is 3,650 km2.
Cassilândia is located in the northeastern part of the state, in the border with Goiás State and is surrounded by beautiful landscapes. It has an international airport and two universities, a private and a state one. The city is known by its famous rodeo party which takes place in late July, early August.