Archbishop Emeritus Desmond Tutu has dedicated his US Presidential Medal of Freedom to all South Africans who fought the country's struggle for freedom and justice.

"I am standing out only because millions of my compatriots are carrying me on their shoulders," he said in a statement after receiving the award from US President Barack Obama at the White House on Wednesday.

The "extraordinary symbolism" of America's first African American President presenting the award to "a former South African township urchin," was humbling, he said.

Tutu was among 16 actors, athletes, activists, scientists and humanitarians to receive the award from Obama.

Other recipients include Irish President and United Nations human rights commissioner Mary Robinson and British physicist Stephen Hawking.

Tutu said Obama's rise to the Oval Office gave hope not just to America, but to the whole world as it grappled with global warming, the global financial crisis, poverty, prejudice and HIV/Aids.

"We are honoured that in these trying times the president saw fit to salute the contribution South Africans have made to deepen the worlds understanding of peace, justice and reconciliation," he said.

The Presidential Medal of Freedom is the highest civilian award in the US, and is not limited to US citizens or civilians.

It recognises people who have made an especially meritorious contribution to the security or national interests of the US, world peace, cultural or other significant public or private endeavours.

According to The Associated Press, the White House described Tutu as having "unflagging devotion to justice, indomitable optimism, and an unmistakable sense of humor...[and of stirring] the world's conscience for decades".

"As a man of the cloth, he has drawn the respect and admiration of a diverse congregation," the White House said.

Tutu had led South Africa through a turning point in modern history with unshakeable humility and a commitment to common humanity.

"He helped heal wounds and lay the foundation for a new nation.

"Desmond Tutu continues to give voice to the voiceless and bring hope to those who thirst for freedom."