Nikpai's victory thousands of miles away has dominated news on several private television and radio stations in Afghanistan.
Afghanistan's President Hamid Karzai is reported to have spoken to Nikpai over the phone to congratulate him on his victory.
And the president of the Afghan Olympic committee, Mohammad Anawar Jegdalak, told the BBC the government would give the martial artist a house to mark the win.
He also said an organisation in Kabul plans to give Nikpai a gift of US$50,000.
Taekwondo is a Korean martial art, brought to Kabul by an American master in 1972.
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