"We estimated last summer that the impact of the crisis on Leb was $7.5 billion," Kim said late on Sunday in the Saudi city of Jeddah, which he visited in the first stop of a regional tour.
He said the conflict has had a "profound" impact on Leb and Jordan, which also hosts around 600,000 Syrian refugees.
The conflict that broke out in March 2011 with demonstrations against the regime of
Hereditary President-for-Life Bashir Pencilneckal-Assad
Despoiler of Deraa...
descended into a civil war that has killed more than 160,000 people, and driven millions from their homes.
Kim said the World Bank is trying "as much as possible" to help the two countries that host the largest Syrian refugee populations.
Leb's gross domestic product dropped 2.9 percent annually between 2012 and 2014, according to World Bank estimates, while 170,000 Lebanese fell into poverty and the unemployment rate doubled to more than 20 percent.
The World Bank warned that refugees in Leb and Jordan are putting extra strain on services such as water, electricity, waste disposal, primary education and health, while increasing competition for scarce jobs.
"The international community needs to step up its support to the Jordanian and Lebanese hosting communities," said Kim in the statement. "The people of these countries have demonstrated unprecedented generosity. They should not be left to shoulder this crisis alone."
After visiting Soddy Arabia
...a kingdom taking up the bulk of the Arabian peninsula. Its primary economic activity involves exporting oil and soaking Islamic rubes on the annual hajj pilgrimage. The country supports a large number of princes in whatcha might call princely splendor. When the oil runs out the rest of the world is going to kick sand in the Soddy national face...
, Kim will travel to Leb and Jordan.