Israel's Arab parties set for largest-ever showing in parliament

* Arab parties surge to 15 seats in 120-member parliament

* Strong Arab turnout may have limited Netanyahu gains

* Opposition to Trump Mideast plan in border areas

By Rami Ayyub and Nuha Sharaf

JERUSALEM/TAIBE, Israel, March 3 (Reuters) - Israel's Arab parties looked poised on Tuesday for their largest-ever representation in parliament, propelled by what analysts say is anger towards Israeli Prime Minister Benjamin Netanyahu and his U.S. allies.

The Joint List coalition of Arab factions looked set to take 15 of parliament's 120 seats with more than 90% of the vote counted, a two-seat boost for representatives of the 21% Arab minority.

Arab voter turnout surged to 64.7%, its highest in 20 years, according to Arik Rudnitzky, a researcher with the Israel Democracy Institute (IDI).

Politicians and analysts said the strong showing helped limit gains by Netanyahu's right-wing Likud party and its partners, which appeared to fall just short of a governing majority after Monday's vote.

"The Netanyahu regime does not have 61 (seats) for one reason: the ascendance of the Joint List," the coalition's leader, Ayman Odeh, said in the Arab city of Shefaram to cheering supporters, who snapped selfies with politicians late into election night.

But the Joint List is unlikely to translate its record showing into influence during coalition negotiations as no Arab party has ever sat in an Israeli government.

The leader of main Likud rivals, the centrist Blue and White party, denied that a government led by it would rely on the Joint List after Likud tried to taint it during the campaign by associating it with Arab lawmakers.

GET OUT THE VOTE

Many of Israel's Arab citizens have protested against a proposal in U.S. President Donald Trump's peace plan - dubbed "The Deal of the Century" - that would put a cluster of Israel's Arab towns near the West Bank into a future Palestinian state.

The Joint List played on Arab anger in those border communities at the prospect of being denied the benefits of Israeli citizenship to encourage people to vote.

It also picked up support from Arab citizens who voted for non-Arab, left-wing Israeli parties in the country's last election in September, according to Rudnitzky, the IDI researcher.

In Taibe, a tree-lined Arab village that could be moved outside Israel under Trump's plan, Ahmad Aweidah said he voted to push back against what he called "Netanyahu's racism" and to reject the U.S. Mideast proposal.

"The Deal of the Century stirred something up in the Arabs. It got them to go vote to try to stop it," the 27-year-old fishmonger said.

Rinad Musleh Jbara, another Taibe resident, said she hoped the Joint List's strong showing "will add to peoples' awareness of the need to exercise their natural, democratic right to vote in elections for the Knesset".

Israel's Arab minority - Palestinian by heritage, Israeli by citizenship - is mostly descended from the Palestinians who lived under Ottoman and then British colonial rule before staying in Israel after the country's 1948 creation.

Arab lawmakers often call for an end to Israel's occupation of the Palestinian Territories and complain their communities face discrimination in areas such as health, education and housing.

Netanyahu’s party counters that its 15 billion shekel ($4.34 billion) investment plan for the Arab sector is the largest ever by an Israeli government. ($1 = 3.4566 shekels)

(Rami Ayyub reported from Jerusalem and Nuha Sharaf from Taibe; editing by Stephen Farrell and Philippa Fletcher)