Kumar, a retired 1984-batch IAS officer of the Jharkhand cadre, will have a five-year tenure and retire in 2025.
President Ram Nath Kovind cleared his appointment with effect from the date he assumes office. His appointment is in place of Lavasa who resigned with effect from August 31.
Ashok Lavasa is the second election commissioner to step down from the poll panel before the completion of his term.
Lavasa, the sources said, has sent his resignation to Rashtrapati Bhavan and has requested to be relieved on August 31.
Lavasa will succeed Diwakar Gupta, whose term will end on August 31.
The meeting was attended by Election Commissioners Ashok Lavasa and Sushil Chandra.
Union ministers and MPs have recently taken a 30 per cent cut in their salaries and some allowances to fund fight against COVID-19.
In a meeting with Legislative Secretary G Narayan Raju, EC also discussed linking of voters list or electoral roll with Aadhaar numbers to clean up duplicate entries, a poll panel statement said.
Congress' comments came a day after the Election Commission (EC) decided not to record the dissents put forward by the members of the "full commission".
I still say transparency is important: EC Ashok Lavasa on his dissent against poll body's clean chits to Modi, Shah
As his demand to record his dissent notes in EC's orders was not met, Lavasa recused himself from cases relating to relating to violations of model code of conduct.