MPCC president Manikrao Thakare told reporters that candidates, office-bearers and senior leaders would attend the meeting, besides chief minister Prithviraj Chavan.
Polling for all 48 seats in the state was held in three phases on April 10, 17 and 24.
Congress had contested 27 seats and its alliance partner NCP 21 seats.
Thakare rubbished surveys which reportedly predict about 10 to 11 seats for the Congress-NCP alliance.
"We will do well," he said.