The United States formally completed its withdrawal from the World Health Organization (WHO) in January 2026, after a process that followed an earlier announcement and notification of intent to leave.

Key dates and context

  • The move to pull out of WHO began earlier in the decade, with the U.S. government issuing notice and starting the legal and diplomatic process required to exit the organization.
  • That withdrawal process ultimately concluded around late January 2026, when reports noted that U.S. membership had ended and the pullout was described as fully “completed.”

In other words, when people ask “when did the US leave WHO,” they’re usually referring to this finalization point in January 2026, when the withdrawal was no longer just planned or initiated but actually took effect.