From Northbridge in Perth and Oxford Street in Sydney to the West End of Brisbane and the damp streets of Adelaide, the almost 62 per cent of Australians who voted in favour of same-sex marriage were partying hard on Wednesday night.

Millions of people celebrated the momentous day in Australian history, filling the country's streets, pubs and clubs to mark the occasion.

As Prime Minister Malcolm Turnbull vowed to implement same-sex marriage by Christmas, supporters of the marriage equality campaign took to the streets armed with rainbow flags and lots of colour and costume.

Oxford Street in Sydney was abuzz with revellers, with a music performance and march in Taylor Square bringing a Mardi Gras-like vibe to the streets.

Yes supporters in Queensland gathered at Trades Hall, with a big event at the Rumpus Room expected to bring in hundreds of partygoers.

Brisbane City Council lit up the Story Bridge in a rainbow of colours in recognition of the historic vote.

Campaigners in Adelaide gathered at the Crown and Anchor and celebrated well into the night.

Despite the city receiving a drenching, nothing was able to dampen the spirits of those who had been waiting a long time for marriage equality.

It was a balmier celebration in Perth's nightclub precinct of Northbridge, where Yes supporters gathered at The Court Hotel to drink and dance the night away.

Melbourne's Lygon Street came alive with throngs of glittered, flag-wearing partygoers gathering to celebrate an emphatic yes to same-sex marriage.

"I'm stoked. I'm 30, I'm gay, I'm also engaged to my partner. So this means so much to me," Abir Ahmed, wearing a Yes shirt, told AAP.

• Heartwarming moment man proposes to boyfriend as they celebrate 'Yes' win

• Tony Abbott's seat voted overwhelmingly in support of same-sex marriage

• Yes vote wins - so what happens next?

"It's vindication, it's validation, it's relief. It's so many emotions just mixed into one."

Victorian Premier Daniel Andrews paid tribute to "decades" of LGBTQI activism and the strength and courage of 'yes' campaigners.

"The last few months have been a very painful time for a lot of people," he said outside the Victorian Trades Hall Council on Wednesday evening.

"Although, an emphatic yes makes everyone feel a little bit better."