A One Nation candidate has come under fire after inappropriate posts and photos were found on his personal Facebook page.

Candidate for Leichhardt Ross Macdonald's questionable history on social media was exposed, which include photos of him groping Thai women's breasts and posing with topless waitresses.

While some of the questionable posts and photos date back to 2010, it's now unclear whether Mr Macdonald will remain in the election race in the far north Queensland seat after the Cairns Post brought his social media history to public attention.

Ross Macdonald (pictured) is the latest One Nation candidate to come under fire

'Mmm YUMMY,' Mr Macdonald captioned a photo of a woman's breasts in one post.

In another photo dated 2016, Macdonald held raffle tickets in front of a young topless woman's breasts and while another shows him groping a lady's bosom in a Thai bar.

Some photos were digitally altered, including one of a large-breasted woman with her generous cleavage on display.

'WOW!! ... What a heart,' Mr Macdonald captioned the photo.

In another photo of a woman in a revealing bikini showing her cleavage, Mr Macdonald commented: 'Very nice. Now come here and give me a smile.'

One Nation candidate Ross Macdonald is under fire for a series of posts and photos on his Facebook page, including this one of a topless woman from 2015

'WOW,' Ross Macdonald captioned this Facebook photo of a young woman from 2015

Some of the posts were removed from his page on Tuesday.

But others remain on his page, including a photoshopped image of a naked woman with four legs meeting at a torso in a suggestive sexual pose.

Mr Macdonald is running in one of Australia's largest electorates, covering an area stretching from Cairns to Cape York and Torres Strait.

The Leichhardt seat has been held by Liberal Nation MP Warren Entsch since 2010.

It's understood Mr Macdonald is unknown to many voters, despite the federal election being less than three weeks away.

He was a no show at the recent ballot draw and a local candidates' debate held on Tuesday, while his election corflutes are nowhere to be seen in the electorate, the Cairns Post reported.

Ross Macdonald (right), pictured with One Nation leader Pauline Hanson (left), is running in the seat of Leichhardt in far north Queensland

Many photos of Mr Macdonald's Facebook page are of women revealing their cleavage

His profile photo and bio are also unavailable on the One Nation website.

Daily Mail Australia has contacted One Nation and Mr Macdonald for comment.

The latest saga for One Nation comes a day Queensland party leader and senate candidate Steve Dickson resigned after footage emerged of him groping dancers and making disparaging comments about a woman in a Washington DC strip club.

One Nation leader Senator Pauline Hanson made no mention of the latest party drama involving Mr Macdonald in an emotional interview with A Current Affair on Tuesday night in relation to the recent scandals that have rocked the party.

While many of inappropriate photos were taken down on Tuesday, some remain, including this digitally altered image posted in 2010