The voting begun at 10 am at the Tilak Hall here.
"This is matter of pride for the people of Uttar Pradesh, the the son of the state is going to become the President", he said.
Both Adityanath and Maurya have not yet resigned from the Lok Sabha and are voters as MPs.
After the conclusion of voting at 5 pm, the ballot boxes will be sealed and sent to Delhi.
The NDA has fielded former Bihar Governor Kovind for the top constitutional post, while former Lok Sabha Speaker Meira Kumar is the joint opposition candidate.
The tenure of incumbent Pranab Mukherjee comes to an end on July 24.
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