| Honorific-Prefix: | Hon. |
| Ranjith Madduma Bandara | |
| Native Name: | රංජිත් මද්දුම බණ්ඩාර ரஞ்சித் மத்தும பண்டார |
| Honorific-Suffix: | MP |
| Office: | Minister of Law and Order |
| President: | Maithripala Sirisena |
| Primeminister: | Ranil Wickremesinghe |
| Term Start: | 8 March 2018 |
| Term End: | 18 November 2019 |
| Predecessor: | Ranil Wickramasinghe |
| Office2: | Minister of Public Administration |
| President2: | Maithripala Sirisena |
| Primeminister2: | Ranil Wickremesinghe |
| Term Start2: | 4 September 2015 |
| Term End2: | 18 November 2019 |
| Office3: | Minister of Internal Transport |
| President3: | Maithripala Sirisena |
| Primeminister3: | Ranil Wickremesinghe |
| Term Start3: | 12 January 2015 |
| Term End3: | 17 August 2015 |
| Constituency Mp5: | National List |
| Parliament5: | Sri Lanka |
| Term Start5: | 20 August 2020 |
| Constituency Mp6: | Monaragala District |
| Parliament6: | Sri Lanka |
| Term Start6: | 1989 |
| Term End6: | 2020 |
| Office4: | General Secretary of the Samagi Jana Balawegaya |
| 1Blankname4: | Leader |
| 1Namedata4: | Sajith Premadasa |
| Term Start4: | 11 February 2020 |
| Predecessor4: | Position Established |
| Birth Date: | 25 August 1954 |
| Birth Place: | Medagama, Dominion of Ceylon |
| Nationality: | Sri Lankan |
| Party: | Samagi Jana Balawegaya (2020-present) |
| Otherparty: | United National Party (before 2020) |
| Relations: | R. M. Gunasekera (father), Dharmadasa Banda (uncle) |
| Children: | Chamathka Ratnayake, Manthika Ratnayake |
| Alma Mater: | Ananda College |
Rathnayaka Mudiyanselage Ranjith Madduma Bandara (born 25 August 1954) (known as Ranjith Madduma Bandara) is a Sri Lankan politician and a member of the Parliament of Sri Lanka. He was appointed as the cabinet Minister of Law and Order and Minister of Public Administration and Management by the President, Maithripala Sirisena, on 8 March 2018.[1] [2] He has also acted as the Minister of Transport.
His father R. M. Gunasekera, former member of the parliament for Bibile, was assassinated when he was seven years old. His uncle was Dharmadasa Banda. He was educated at Ananda College and became a planter and a businessman.[3]
He is a long time member of Sri Lanka's main political party United National Party, and had held many positions in the party. On February 11, 2020 he was appointed as the General Secretary of Samagi Jana Balawegaya.[4]