The move will take effect from December 31, 2018. The United States will remain a full member of UNESCO until that time.
"This decision was not taken lightly, and reflects U.S. concerns with mounting arrears at UNESCO, the need for fundamental reform in the organization, and continuing anti-Israel bias at UNESCO," the U.S. State Department said in a statement.
However, the country hopes to remain a non-member, observer state, in order to contribute US opinions and expertise on issues like press freedoms and protecting world heritage.
UNESCO director general Irina Bokova said in a statement: "After receiving official notification by the United States Secretary of State, Rex Tillerson, as UNESCO Director-General, I wish to express profound regret at the decision of the United States of America to withdraw from UNESCO."(ANI)