The Third Legislative Assembly of Uttar Pradesh (a.k.a.Third Vidhan Sabha of Uttar Pradesh) was constituted on 7 March 1962 as a result of 1962 Uttar Pradesh Legislative Assembly election which was concluded on 19 February 1957. The Third Legislative Assembly had 430 elected MLAs. The assembly was in house for full term of five years before being dissolved on 9 Mar 1967.

Party wise strength Party 1962 1 Indian National Congress INC 249 2 Bhartiya Jana Sangh BJS 49 4 Independent IND 31 3 Praja Socialist Party PSP 38 5 Communist Party of India CPI 146 Socialist Party of India SOC 247 Swatantra Party SWA 158 Republican Party of India RPI 89 Hindu Mahasabha HMS 2 Total 430

List of constituencies and elected members