Sitting and previous MLAs from Lachmangarh Assembly Constituency
| Year | Winner Candidate | Party | Votes | Runner-Up | Party | Votes |
|---|---|---|---|---|---|---|
| 2018 | Govind Singh Dotasara | INC | 98,227 | Dinesh Joshi | BJP | 76,175 |
| 2013 | Govind Singh | INC | 55,730 | Subhash Maharia | BJP | 45,007 |
| 2008 | Govind Singh Dotasra | INC | 31,705 | Dinesh Joshi | IND | 31,671 |
| 2003 | Amra Ram | CPM | 44,647 | Rameshwar Lal | BJP | 23,500 |
| 1998 | Amra Ram | CPM | 44,672 | Ramdeo Singh | INC | 41,832 |
| 1993 | Amara Ram | CPM | 44,375 | Ramdev Singh | INC | 31,843 |
| 1990 | Ram Dev Singh | INC | 32,906 | Jai Singh Shekhavat / Badam Singh | JD | 30,614 |
| 1985 | Ramdev Singh | INC | 33,549 | Jai Singh Sekhawat | LKD | 27,240 |
| 1980 | Ram Deo Singh | INC(I) | 29,275 | Gordhan Singh | BJP | 16,086 |
| 1977 | Randeo Singh | INC | 30,106 | Gordhan Singh | JNP | 23,355 |