The United States is promising $US212 million ($A229.38 million) in aid to the Palestinians as part of an international effort to rebuild the Gaza Strip after this summer's 50-day war.
US Secretary of State John Kerry says people in Gaza "need our help desperately - not tomorrow, not next week, but they need it now."
He announced the new money at a donor conference for the Palestinians in Cairo.
The Palestinians are seeking $US4 billion in international aid.
At least 100,000 Gazans lost their homes in the war and much of the territory's infrastructure was damaged.
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Earlier on Sunday, the Palestinian and Egyptian presidents called on Israel to commit to a long-term peace initiative.
They urged Israel to give up land seized in the 1967 war and accept a fair solution for Palestinian refugees in exchange for full recognition.
