SP chief Mulayam Singh Yadav is contesting from both Mainpuri and Muslim-dominated Azamgarh, senior party leader Reoti Raman Singh is contesting from Allahabad and Dimple Yadav, wife of Chief Minister Akhilesh Yadav, is SP candidate from Kannauj.
The BSP seems to be facing the worst ever performance in its electoral history in recent past, with the party trailing in all seats.
According to the vote count in the first five hours, the BJP got 42.6 percent of the total votes polled, the SP got 23.9 percent and the BSP 19.3 percent.
The Congress got only 7.3 percent of votes polled, while the AAP managed a bare 0.8 percent of the votes.
In case the BJP maintains its position, the saffron party will register its best ever performance in the state. In 1998, the party won 57 seats in an undivided Uttar Pradesh which then had 85 seats.