As Uttar Pradesh remains crucial for the Congress electoral arithmetic, the poor show was "certainly a cause for worry" for the party, a party leader said. The Congress holds 22 of the state's 80 Lok Sabha seats.
Rahul Gandhi is to address eight rallies across Uttar Pradesh this year. The Bharatiya Janata Party (BJP) has announced nine rallies to be addressed by its prime ministerial candidate Narendra Modi.
The ruling Samajwadi Party is slated to hold 18 rallies.
The thin attendance at Gandhi's rallies has been ridiculed by his opponents.
