An 11th woman, adult actress Jessica Drake, has come forward to accuse US Republican presidential candidate Donald Trump of inappropriate conduct.

Drake claims Trump offered her $10,000 and access to his jet to come to his penthouse hotel room at a golf event in 2006.

Drake, at a Saturday media conference with attorney Gloria Allred, said she met Trump 10 years ago at a golf tournament in Lake Tahoe.

Drake said Trump invited her to his suite after the tournament.

She went with some friends and alleges that when they arrived he grabbed each of the women tightly and kissed them.

Drake says a Trump representative later called to invite her to his room, but she declined.

There was another call in which she says she was asked, “What do you want? How much?”

After Drake declined the invitation, she was allegedly offered $US10,000.

Drake is the 11th woman to accuse Trump of inappropriate conduct. Allred represents two others.

Trump has denied all allegations and has vowed to launch post-election lawsuits against every woman who has accused him of sexual assault or other inappropriate behaviour.

In relation to Drake, Trump’s camp released this statement:

“This story is totally false and ridiculous.

“The picture is one of thousands taken out of respect for people asking to have their picture taken with Mr Trump.

“Mr Trump does not know this person, does not remember this person and would have no interest in ever knowing her.

“This is just another attempt by the Clinton campaign to defame a candidate who just today is number one in three different polls.

“Anyone who would pay thugs to incite violence at a rally against American citizens, as was released on video, will stop at nothing. Just another example of the Clinton campaign trying to rig the election.”

Allred (L) holds a picture of Drake and Trump that was allegedly taken in Lake Tahoe in 2006. Photo: AAP

During a speech in Gettysburg on Saturday, Trump said he looked forward to taking legal action against his accusers.

“Every one of these liars will be sued once the election is over,” Mr Trump said.

“I look so forward to doing that.

“Every woman lied when they came forward to hurt my campaign.”

Allred has responded by vowing to launch counter suits if he sues the victims as promised.

“Be careful what you wish for Mr Trump,” Allred said.

“Your latest threat is an admission of the hopelessness of your cause.

“It is nothing more than a transparent promise of revenge.

“Your threat is below the dignity of the office you are seeking.”