Surprise candidate Giorgia Meloni looks set to become Italy's first woman prime minister of its most right-wing government since World War II as the country voted a conservative alliance to triumph in Sunday's elections.

Near final results showed the rightist bloc should have a solid majority in both houses of parliament, potentially giving Italy a rare chance of political stability after years of upheaval and fragile coalitions.

"Giorgia Meloni has won," Italy's biggest-circulation daily, Corriere della Sera, splashed on its front page, while the right-leaning Il Tempo ran with "It's Giorgia's turn."

Meloni and her allies face a daunting list of challenges, including soaring energy prices, the war in Ukraine and a renewed slowdown in the eurozone's third-largest economy.

"We must remember that we are not at the endpoint, we are at the starting point. It is from tomorrow that we must prove our worth," the 45-year-old Meloni told cheering supporters of her nationalist Brothers of Italy party early Monday morning.

Meloni plays down her party's post-fascist roots and portrays it as a mainstream group like Britain's Conservatives. She has pledged to back Western policy on Ukraine and not take risks with Italy's fragile finances.

European capitals and financial markets will carefully scrutinize her early moves, given her eurosceptic past and her allies' ambivalent position on Russia.

In her victory speech, Meloni struck a conciliatory tone.

"If we are called on to govern this nation we will do it for all the Italians, with the aim of uniting the people and focusing on what unites us rather than what divides us," she said. "This is a time for being responsible."

League woes

With results counted in more than 90% of polling stations, the Brothers of Italy led with more than 26%, up from just 4% in the last national election in 2018, as voters opted for a largely untried figure to sort out the nation's many problems.

By contrast, her main ally suffered a disastrous night, with Matteo Salvini's League picking up around 9% of the vote, down from more than 17% four years ago, and being overtaken by Meloni in all its traditional fiefdoms in the north.

The other major conservative party, Silvio Berlusconi's Forza Italia, scored around 8%.

Although Meloni's alliance is forecast to hold comfortable majorities in the upper and lower houses, its members have divergent positions on several issues which might be difficult to reconcile.

Salvini, for example, questions the West's sanctions against Russia and both he and Berlusconi have often expressed their admiration of its leader Vladimir Putin.

They also have differing views on how to deal with surging energy bills and have laid out a raft of promises, including tax cuts and pension reform, that Italy will struggle to afford.

Sarah Carlson, senior vice president of Moody's credit ratings agency, said the next Italian government will have to manage a debt burden "that is vulnerable to negative growth, funding cost, and inflation developments".

Meloni will take over from Prime Minister Mario Draghi, the former head of the European Central Bank, who pushed Rome to the center of EU policymaking during his 18-month stint in office, forging close ties with Paris and Berlin.

In Europe, the first to hail her victory were hard-right opposition parties in Spain and France, and Poland and Hungary's national conservative governments which both have strained relations with Brussels.

Despite its clear-cut result, the vote was not a ringing endorsement for the conservative alliance. Turnout was just 64% against 73% four years ago – a record low in a country that has historically had strong voter participation.

The right took full advantage of Italy's electoral law, which benefits parties that forge pre-ballot alliances. Center-left and centrist parties failed to hook up and even though they won more votes than the conservatives, they ended up with far fewer seats.

The center-left Democratic Party (PD) took some 19%, while the left-leaning, unaligned 5-Star Movement scored around 15%, a result above expectations. The centrist "Action" group was on just over 7%.

"This is a sad evening for the country," said Debora Serracchiani, a senior PD lawmaker. "(The right) has the majority in parliament, but not in the country."