Mr Netanyahu has pressed the United States to recognise its claim and raised that possibility in his first White House meeting with Mr Trump in February 2017. That's a boost for Netanyahu, who is heading into a general election while plagued by corruption investigations.
Israeli Ambassador to the United Nations Danny Danon also thanked Trump.
Turkish President Recep Tayyip Erdogan said in a speech at a meeting of the Organisation of Islamic Cooperation: "We can not allow the legitimisation of the occupation of the Golan Heights". Which, obviously, means that it was, and that signing a presidential decree on Israel's sovereignty over the Golan Heights during Prime Minister Netanyahu's visit in the oval office early next week is a gift better than cigars and champagne.
Arab League Secretary-General Ahmed Aboul Gheit said Mr. Trump's announcement was "completely beyond global law". "U.S. President Donald Trump's unacceptable comments on the Golan Heights feed this warped mentality". Netanyahu told Trump, "You made history".
When speaking to reporters on Thursday before Trump's announcement, Secretary of State Mike Pompeo told reporters that the U.S. administration "will make sure to get answers" before confirming full recognition of Israel's sovereignty over the Golan Heights.
Analysts say the move draws a red line and sends a strong signal to Iran that the U.S. stands with Israel on the Golan Heights.
Israel captured much of the Golan from Syria in a 1967 war and annexed it, a move not endorsed internationally.
Netanyahu will address AIPAC's annual conference during his visit to Washington next week. UN Security Council Resolution 497 declared the Israeli decision "null and void and without global legal effect".
The Golan Heights were part of Syria until 1967, when Israel captured most of the area in the Six Day War, occupying it and annexing it in 1981.
Ahmed Aboul Gheit, Secretary-General of the Arab League, issued a statement saying the Trump Declaration was contrary to global law, and that the league of Arab nations supports Syria's right to the Golan territory. Paula White, a megachurch pastor and adviser to Trump, has also compared him to Esther.
While the United States has supported the modern Israeli state since its establishment in 1948, the Trump administration has dramatically shifted US policy on the Arab-Israeli conflict.
Israel has built dozens of settlements in the Golan over the years, with an estimated 26,000 Jewish settlers living there as of 2019.
"The U.S recognition of Israeli sovereignty in the Golan makes us happy, however our daily routine does not involve dealing with whether Israeli sovereignty is being recognized or not", said Haim Rokah, head of the regional Israeli council in the Golan.