| Honorific-Prefix: | Hon. |
| K. Kader Masthan | |
| Native Name: | காதர் மஸ்தான் කාදර් මස්තාන් |
| Honorific-Suffix: | MP |
| Constituency Mp2: | Vanni District |
| Parliament2: | Sri Lanka |
| Term Start2: | 1 September 2015 |
| Office: | Minister of State for Rural Economy |
| Term Start: | 18 April 2022 |
| Term End: | 24 September 2024 |
| Office1: | Deputy Minister of Resettlement, Rehabilitation and Northern Development |
| Term Start1: | 12 June 2018 |
| Term End1: | 15 December 2018 |
| Birth Date: | 11 January 1971 |
K. Kader Masthan is a Sri Lankan politician and member of parliament from the Vanni Electoral District. He is also the former State Minister of Rural Economy.[1] [2]