Pope Francis drew more than 6.6 million people to his audiences, Masses and other events in Vatican City during his first year in office, figures show.
His predecessor, Pope Benedict XIV, attracted just 2.3 million people for the whole of 2012.
Pope Francis, named Person of the Year by Time magazine, is the Roman Catholic Church's first Latin American leader.
He is also the first Jesuit at the helm of the Church.
'Community of brothers'
The Vatican said the new figures were based on the number of tickets issued for papal events, as well as on estimates of crowds attending his weekly appearances at St Peter's Square.
The data was released a day after the pontiff gave his first New Year blessing, calling for the world to unite against violence as a "community of brothers".
Addressing pilgrims in St Peter's Square, Pope Francis departed from his prepared text to vent frustration at the level of conflict in the world.
"What is happening in the heart of man?" he asked. "It's time to stop."
He has eschewed some of the more regal trappings of high office, made headlines by washing the feet of prisoners, and called for power to be devolved away from the Vatican.
He has also adopted a markedly less formal tone than previous popes, underlining his reputation for simplicity and humility.
Earlier this year, the pontiff raised eyebrows among conservative fractions when he said the Catholic Church was too focused on preaching about abortion, gay people and contraception, and needed to become more merciful.
He is expected to announce some major reforms in Church organisation for 2014.