Deputy Secretary of State William Burns stressed during talks in Beijing that no country should take unilateral action to assert its claims, the US Embassy in Beijing said in a statement.
China should "work constructively with its neighbours to reduce tensions in the East China Sea and the South China Sea," Burns said.
The statement said Burns "reiterated long-standing US interests in all parties managing the situation diplomatically."
The US says it doesn't take a position on who owns the islands, but insists on the right to freedom of navigation through surrounding seas.
Washington also has mutual defense treaties with Japan and the Philippines, one of the main claimants in the South China Sea, meaning the US could be drawn in if a conflict were to erupt.