Media coverage of this emergency has been decreasing and as a result, aid to migrants by the government and private individuals has also decreased," the fund added.
"In this context, Pope Francis donated US $500,000 to assist migrants in Mexico. This amount will be distributed among 27 projects in 16 dioceses and among Mexican religious congregations that have asked for help in order to continue providing housing, food and basic necessities to these our brothers and sisters."
In March, the Pope criticised political leaders who tried to erect barriers to keep migrants out.
"Builders of walls, be they made of razor wire or bricks, will end up becoming prisoners of the walls they build," he said.