Documents seen by the Associazted Press show Natalia Veselnitskaya served as a ghostwriter for top Russian government lawyers and received assistance from senior Interior Ministry personnel.
She met Donald Trump Jr in June 2016, five months before his father beat Hillary Clinton to the White House.
She has always denied acting as a representative of the Russian government.
Special Counsel Robert Mueller is investigating Russian interference with the 2016 presidential election, including the possibility of collusion with the Trump campaign.
Last week, a total of 12 Russian intelligence agents were criminally indicted and accused of a “sustained effort” to hack Democrat emails and computer networks.
All 12 accused are members of the GRU, a Russian intelligence agency connected to the Russian military.
They were all acting in “their official capacities,” according to reports.
Deputy Attorney General, Rod Rosenstein said the official indictment does not name any American citizen, but has told reporters the defendants “corresponded with several Americans during the course of the conspiracy through the internet.”
He said at a news conference: “There is no allegation in this indictment that any American citizen committed a crime.”
The Justice Department has claimed hacking specifically targeted Hillary Clinton’s campaign and the Democratic Party, with the intention to “release that information on the internet under the names DCLeaks and Guccifer 2.0 and through another entity.”
Mr Mueller has asked to interview of President Trump as part of his investigation but the President is yet to confirm he will cooperate.
Trump’s team have always denied any collusion between the US and the Russian government on hacking.
Deputy White House press secretary said there is no evidence tying the Trump campaign to hacking attempts.
She said following Rosenstein’s statement: “Today’s charges include no allegations of knowing involvement by anyone on the campaign and no allegations that the alleged hacking affected the election result.
“This is consistent with what we have been saying all along.”
The President’s private attorney has called for the Mueller investigation to end.
The lawyer tweeted: “The Russians are nailed. No Americans are involved. Time for Mueller to end this pursuit of the President and say President Trump is completely innocent.”