Speaking in Kyiv, Mr Blinken said Washington has the power to seize Russian assets in the US and will use them to help rebuild Ukraine.
He also said that Ukraine is getting “closer to Nato”.
Earlier, the top US diplomat told Ukraine President Volodymyr Zelensky that military aid is “now on its way”.
“What Putin destroyed, Russia should - must - pay to rebuild. It’s what international law demands. And it’s what the Ukrainian people deserve,” Mr Blinken said during his speech at Kyiv Polytechnic University.
“Our Congress has given us the power to seize Russian assets in the US, and we intend to use it,” he said.
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