It's voted Republican for nearly quarter of a century, but now it appears Donald Trump has managed to turn the state of Georgia towards Hillary Clinton.

According to a YouGov poll, Ms Clinton leads the property tycoon with 48.3 per cent of the vote compared to his 42.4 per cent, marking the map with a faint blue.

Her claim on Georgia shrinks the size of the Republican South and further mars Donald Trump's chances winning the White House.

Donald Trump has now lost Florida, North Carolina and Georgia in the South (YouGov)

The last time Georgia voted Democrat was in 1992 when Bill Clinton won with a slim majority. However since 1964 it has been, for the most part, a Republican heartland.

Georgia's blue transformation completes a run of southern states that have flipped to the Democrats, joining Florida and North Carolina.

The change reflects a significant shift in demographics, with Georgia predicted to have a minority white population by 2025.

Donald Trump: Clinton should take a drugs test

Mr Trump leads with white voters 66 per cent to 23 per cent, while the Democrat wins the vast majority of black voters 87 per cent to 8 per cent.

Ms Clinton is also the favourite among Hispanic voters 53 per cent to 35 per cent.

To add to Mr Trump's misfortune, he is underperforming among men in the state. He is only predicted to get 48 per cent of the vote compared to the Democrat’s 42 per cent. This is crucial, since he needs a significant lead among men to overcome female voters’ distaste for him.

Ms Clinton has a more sizeable lead among female voters in the state: 51 per cent compared to Mr Trump's 41 per cent.

And the Democrat's lead could increase overall if the billionaire property magnate continues to depress voter turnout by repeatedly describing the election as rigged.

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Mr Trump is also in trouble according to a recent nationwide poll by NBC News and The Wall Street Journal.