Deputy Attorney General Rod Rosenstein told reporters Friday that the defendants worked for the GRU, Russia's premier military intelligence agency.
Trump told reporters in London Friday that he will "absolutely firmly" ask Putin about the finding by USA intelligence agencies that he authorized the campaign of interference.
Along with breaking into the DNC and Clinton's campaign, the spies named in the indictment also hacked the state boards of elections, secretaries of state and companies that provided election software to steal information about voters.
In a statement during a press conference Friday, Rosenstein said law enforcement officials are seeking to hold responsible those behind the election meddling and defended the probe against partisanship. It claims that they created fictitious online personas, including "DCLeaks" and "Guccifer 2.0", and used them to release the documents starting un June 2016.
U.S. President Trump's views on UK's May, Brexit
Khan, who has often been a target of Trump's ire, backed the protests but said those who want to cause trouble are not welcome. But the president told The Sun that Khan himself had "not been hospitable to a government that is very important".
Rosenstein's announcement took place just ahead of a planned meeting between President Trump and Russian President Vladimir Putin on Monday in Helsinki.
While Friday's indictment does not include any criminal allegations against a US citizen, the charges note that Guccifer 2.0 allegedly communicated with "U.S. persons about the release of stolen documents". So far, two dozen Russians have been indicted, while several others have faced charges for other crimes, including Paul Manafort, President Donald Trump's former campaign chairman and Michael Flynn, the Trump White House's former national security adviser.
"There is no allegation in this indictment that Americans knew they were corresponding with Russian intelligence officers", said Rosenstein, who also noted there is no evidence the alleged hacking had any impact on the election results.
In the indictment, which became the latest development in the special counsel investigation headed by former FBI Director Robert Mueller, described the details of the transaction.
Mr Rosenstein said there were no allegations that United States citizens were involved in the alleged crimes.