Congress had boycotted the non-stop 36-hour special session of UP legislature on Gandhi Jayanti.
BSP candidate Naushad Ali got 28,749 votes and Congress' Hardeepak Nishad came on fourth with a little over 16,000 votes.
This is the first time since 2014, that the bypoll will be fought for, minus any alliances.
The opposition Samajwadi Party had planned to show black flags in protest.
The new organisational reshuffle is being viewed as an initiative of the BSP chief to strike a caste calculus by bringing Muslims, Backwards and Dalits at par.
Perceived more as an advocate of hardcore Hindutva and a right-wing poster boy, Yogi Aditynath’s selection to lead UP had rattled many.
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The Singhs who were Congress loyalists felt demeaned and strangulated by the party high command, forcing their exit from the Congress despite years of service and loyalty.
Unhappy with lack of development in UP, Samajwadi MP Azam Khan thinking of quitting Parliament and fighting Assembly polls
In the recently concluded Lok Sabha elections, he had defeated BJP's Jaya Prada from the Ramgarh parliamentary constituency.
NIZAM, he explained, stood for Nasimuddin Siddiqui , Imran Masood, Azam Khan, Atique Ahmed and Mukhtar Ansari.
In the battle of 2019, all the major parties have their eyes fixed on the Other Backward Castes vote bank as they constitute an overwhelming 40 per cent chunk of the state’s total population.
Yogi Adityanath did not even know how to take a dip at Kumbh, the former Chief Minister said.
The joining of Choudhury Virendra Singh, a prominent Gujjar leader of west UP, has serve a big blow to the Mahagathbandan in west UP, which goes to polls in the first two phases.
Her comment came as an indication of Congress' plan for the state and the reason Priyanka has been brought there.
The BJP, seemingly in a spot with SP and BSP joining hands, is still deciphering the potential impact of the Congress' 'trump card' entering the arena.
Sources say BJP has split the state into four zones and entrusted key leaders with the task of translating the strategy to action by hand-picking caste leaders from each parliamentary constituency.