In a statement, Edward Snowden also accused the US government of showing “no respect” for international law.
The US has charged Edward Snowden with leaking details of its electronic surveillance programmes.
Washington has expressed its “extreme disappointment” at Russia’s decision.
White House spokesman Jay Carney said they were considering whether a meeting between US President Barack Obama and his Russian counterpart Vladimir Putin in September should go ahead.
The latest developments came amid fresh revelations from the cache of documents leaked by Edward Snowden.
Documents seen by the UK’s Guardian newspaper appear to show the US government paid at least $150 million to the UK’s GCHQ spy agency to secure access to and influence over Britain’s intelligence gathering programmes.
Edward Snowden’s lawyer, Anatoly Kucherena, said the former CIA contractor had left Sheremetyevo Airport at about 14:00 local time for an undisclosed destination.
Showing a photocopy of the document issued to his client, he described Edward Snowden as “the most pursued man on the planet”.
Anatoly Kucherena said Edward Snowden was being looked after by a legal expert from the whistleblowing organization WikiLeaks.
Russia’s Federal Migration Service later officially confirmed that Edward Snowden had been granted temporary asylum for one year, Interfax news agency reported.
In a statement issued on the WikiLeaks website, Edward Snowden said: “Over the past eight weeks we have seen the Obama administration show no respect for international or domestic law, but in the end the law is winning.
“I thank the Russian Federation for granting me asylum in accordance with its laws and international obligations.”
President Barack Obama and President Vladimir Putin had been scheduled to meet on the sidelines of a G20 summit in early September in Saint Petersburg.
However, Jay Carney said: “We’re extremely disappointed that the Russian government would take this step despite our very clear and lawful requests in public and in private to have Mr. Snowden expelled to the United States to face the charges against him.
“We’re evaluating the utility of a summit in light of this and other issues.”
Earlier, Senator Robert Menendez, chairman of the powerful Senate Foreign Relations Committee, described Thursday’s development as “a setback to US-Russia relations”.
“Edward Snowden is a fugitive who belongs in a United States courtroom, not a free man deserving of asylum in Russia,” he said.
Republican Senator John McCain also issued a stinging rebuke, saying Russia’s actions were “a disgrace and a deliberate effort to embarrass the United States”.
“It is a slap in the face of all Americans. Now is the time to fundamentally rethink our relationship with Putin’s Russia. We need to deal with the Russia that is, not the Russia we might wish for,” he said.
Vladimir Putin has said previously that Edward Snowden could receive asylum in Russia on condition he stopped leaking US secrets.
The Russian president’s foreign policy adviser, Yury Ushakov, said the situation was “rather insignificant” and should not influence relations with the US.
Information leaked by Edward Snowden first surfaced in the Guardian newspaper in early June.
It showed that the National Security Agency (NSA) was collecting the telephone records of tens of millions of Americans.
The systems analyst also disclosed that the NSA had tapped directly into the servers of nine internet firms including Facebook, Google, Microsoft and Yahoo to track online communication in a surveillance programme known as PRISM.
PRISM was allegedly also used by Britain’s electronic eavesdropping agency, GCHQ. The agency was further accused of sharing vast amounts of data with the NSA.
Allegations that the NSA had spied on its EU allies caused indignation in Europe.
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