"That is something we are considering," he told reporters ahead of talks with the leaders of Mexico and Canada.
A diplomatic boycott would mean that no US officials are sent to attend the games. The decision comes amid rising tension in the US-China relationship.
On Monday, Mr Biden held his first direct talks with China's Xi Jinping.
At the White House, Biden spokeswoman Jen Psaki said that the US and China leaders did not discuss the Olympics during their three-hour virtual meeting on Monday.
Both Democratic and Republican lawmakers have called for a diplomatic boycott as a means to protest against Chinese human rights abuses.
A diplomatic boycott would not affect athletes, but Ms Psaki said the US is still finalising "what our presence will be" at the games, which are due to begin on 4 February.
The US has accused China of genocide towards the Uighurs - a Muslim minority group which lives mostly in the autonomous region of Xinjiang.
Tensions have also risen over the way China has acted to repress political freedoms in Hong Kong.
Mr Biden's comment came as he was hosting Mexico President Andres Manuel Lopez Obrador and Canada Prime Minister Justin Trudeau for formal talks at the White House.
The talks, dubbed the Three Amigos Summit, are expected to focus on border issues, tax subsidies for electric vehicles, Covid precautions and other issues.