Sonia Gandhi was formally re-elected Congress president with the party's Central Election Authority announcing her unopposed election.
The announcement was made by CEA chairperson Oscar Fernandes in the presence of Gandhi and several senior leaders, Union ministers and party workers amid jubilant scenes at the Congress headquarters.
Fernandes presented a certificate to Gandhi on her election.
"I declare Sonia Gandhi duly elected unopposed president of the Indian National Congress," he said.
Out of 100 nominations recieved proposing Gandhi's name for the top party post, 97 were found valid.
Expressing her heartfelt thanks to party workers for electing her for the third consecutive time, Gandhi said "I want to assure you that I will work with you day and night and put all my efforts to make Congress stronger than ever."
She said the party had faced many challenges in the last few years, "but despite this, our work has brought us to the Centre.
"But we should not sit down satisfied because of this. We have to become more active than before," she said addressing the workers.
This was the first organisational election in Congress after party-led United Progressive Alliance came to power at the Centre.
Gandhi had taken over as party President in 1998 replacing Sitaram Kesri.
