Elections to the Assam Legislative Assembly were held on 25 February 1957. 312 candidates contested for the 94 constituencies in the Assembly. There were 14 two-member constituencies and 80 single-member constituencies. Subsequently, the Third Medhi ministry was sworn in for office.
<section begin="Results" /> |- !colspan=10| |- style="background-color:#E9E9E9; text-align:center;" ! class="unsortable" | ! Political party !! Flag !! Seats <br /> Contested !! Won !! Net change <br /> in seats !! % of <br /> Seats ! Votes !! Vote % !! Change in <br />vote % |- style="background: #90EE90;" | | style="text-align:left;" |Indian National Congress | | 101 || 71 || 5 || 65.74 || 13,21,367 || 52.35 || 8.87 |- | | style="text-align:left;" |Praja Socialist Party | | 36 || 8 || New || 7.41 || 3,21,569 || 12.74 || New |- | | style="text-align:left;" |Communist Party of India | | 22 || 4 || 3 || 3.70 || 2,04,332 || 8.10 || 5.26 |- | | | 153 || 25 || 11 || 23.15 || 6,76,698 || 26.81 || N/A |- class="unsortable" style="background-color:#E9E9E9" ! colspan = 3| ! style="text-align:center;" |Total seats !! 108 ( 3) !! style="text-align:center;" |Voters !! 55,53,926 !! style="text-align:center;" |Turnout !! colspan = 2|25,23,966 (45.44%) <section end="Results" />