| Name Of Party | 1951 | 1957 | 1962 | 1967 | 1969 | 1971 | 1972 | 1977 | 1982 | 1987 | 1991 | 1996 | 2001 | 2006 | 2011 |
| INDIAN NATIONAL CONGRESS(INC) | 150 | 152 | 157 | 127 | 55 | 105 | 216 | 20 | 49 | 40 | 43 | 82 | 26 | 21 | 42 |
| COMMUNIST PARTY OF INDIA(CPI) | 28 | 46 | 50 | 16 | 30 | 13 | 35 | 2 | 7 | 11 | 5 | 6 | 7 | 8 | 2 |
| BHARATIYA JAN SANGH(BJS) | 9 | 0 | 1 | 0 | 1 | 0 | |||||||||
| F.B. (MARXIST GROUP)(FBL-MG) | 11 | ||||||||||||||
| AKHIL BHARATIYA HINDU MAHASABHA(HMS) | 4 | 0 | 0 | 0 | 0 | ||||||||||
| KISAN MAZDOOR PRAJA PARTY(KMPP) | 15 | ||||||||||||||
| PRAJA SOCIALIST PARTY(PSP) | 21 | 5 | 7 | ||||||||||||
| FORWARD BLOC (MARXIST)(FBM) | 8 | ||||||||||||||
| FORWARD BLOC(FB) | 13 | ||||||||||||||
| REVOLUTIONARY SOCIALIST PARTY(RSP) | 9 | 12 | 3 | 3 | 20 | 19 | 18 | 18 | 18 | 17 | 20 | 7 | |||
| LOK SEWAK SANGH(LSS) | 4 | 4 | 0 | ||||||||||||
| COMMUNIST PARTY OF INDIA (MARXIST)(CPM) | 43 | 80 | 113 | 14 | 178 | 174 | 187 | 189 | 157 | 143 | 40 | ||||
| SANGHATA SOCIALIST PARTY(SSP) | 7 | 9 | 0 | ||||||||||||
| FARWARD BLOCK(FBL) | 13 | 21 | 3 | 0 | 25 | 28 | 26 | 29 | 21 | 25 | |||||
| BANGLA CONGRESS(BAC) | 34 | 33 | 5 | ||||||||||||
| PRAJA SOCIALIST PARTY(PSP) | 5 | 3 | |||||||||||||
| SOCIALIST UNITY CENTRE OF INDIA(SUC) | 7 | 7 | 1 | 4 | 2 | 2 | |||||||||
| ALL INDIA GORKHA LEAGUE(IGL) | 4 | 2 | 2 | ||||||||||||
| PROGRESSIVE MUSLIM LEAGUE(PML) | 3 | 0 | |||||||||||||
| JANATA PARTY(JNP) | 29 | 0 | 0 | ||||||||||||
| ALL INDIA TRINAMOOL CONGRESS(AITC) | 60 | 30 | 184 | ||||||||||||
| COMMUNIST PARTY OF INDIA (MARXIST-LENINIST) (LIBERATION)(CPI-M) | 176 | ||||||||||||||
| ALL INDIA FORWARD BLOC(AIFB) | 23 | 11 | |||||||||||||
| WEST BENGAL SOCIALIST PARTY(WBSP) | 4 | 4 | |||||||||||||
| GORAKHA NATIONAL LIBERATION FRONTGNLF) | 3 | 3 | 3 | 0 | |||||||||||
| GORKHA JANMUKTI MORCHA(GOJAM) | 3 | ||||||||||||||
| INDEPENDENT | 19 | 25 | 11 | 31 | 11 | 12 | 5 | 10 | 11 | 9 | 6 | 5 | 9 | 6 | 2 |
| OTHERS | 2 | 0 | 3 | 1 | 6 | 12 | 4 | 6 | 4 | 1 | 4 | 2 | 0 | 3 | 3 |
| TOTAL | 238 | 252 | 252 | 280 | 280 | 279 | 280 | 294 | 294 | 294 | 294 | 294 | 294 | 294 | 294 |
