Lachen Mangan Vidhan Sabha Constituency
Lachen Mangan is a Vidhan Sabha (Legislative Assembly) constituency of the State of Sikkim in India. This seat is reserved for Bhutia Lepcha (BL).Areas after delimitation order of 2008
Revenue Blocks : Lachen, Lachung, Chungthang, Tung, Lachung and Lachen and Chungthang Forest Blocks in Chungthang Sub-Division; Naga-Namgor Singhik, Ringhim, Nampatam, Meyong, Singchit, Pakshep, Kazor, Sentam, Mangan(NTA) and Naga and Mangan Forest Blocks in Mangan Sub-Division.
General Election 2019
TOTAL ELECTORS 7867| CANDIDATE | SEX | AGE | CATEGORY | PARTY | VALID VOTES POLLED | % VOTES POLLED |
| 1 SAMDUP LEPCHA | M | 55 | ST | SKM | 3615 | 53.8 |
| 2 TSHERING WANGDI LEPCHA | M | 52 | ST | SDF | 3031 | 45.11 |
| 3 NOTA | NOTA | NOTA | 73 | 1.09 | ||
| TURNOUT TOTAL: | 6719 | 85.41 |
General Election 2014
TOTAL ELECTORS : 6874TURNOUT TOTAL: 5852 (85.13%)
Detailed Results
| CANDIDATE | SEX | AGE | CATEGORY | PARTY | VALID VOTES POLLED | % VOTES POLLED |
| 1 TSHERING WANGDI LEPCHA | M | 47 | ST | SDF | 3127 | 53.43 |
| 2 SAMDUP LEPCHA | M | 48 | ST | SKM | 2570 | 43.92 |
| 3 None of the Above | NOTA | NOTA | 79 | 1.35 | ||
| 4 TOPDEN LEPCHA | M | 47 | ST | INC | 76 | 1.30 |
2009 general election results
| Candidate | Sex | Age | Category | Party | Votes polled | % Votes polled |
| 1 TSHERING WANGDI LEPCHA | M | 38 | ST | SDF | 2719 | 53.30 |
| 2 ANIL LACHENPA | M | 46 | ST | INC | 1940 | 38.03 |
| 3 CHEWANG JIGME LEPCHA | M | 28 | ST | SHRP | 442 | 8.66 |