First Zionist Congress was the inaugural congress of the Zionist Organization (ZO) (to become the World Zionist Organization (WZO) in 1960) held in Basel (Basle), Switzerland, from August 29 to August 31, 1897. 208 delegates and 26 press correspondents attended the event. It was convened and chaired by Theodor Herzl, the founder of the modern Zionism movement. The Congress formulated a Zionist platform, known as the Basel program, and founded the Zionist Organization. It also adopted the Hatikvah as its anthem (already the anthem of Hovevei Zion and later to become the national anthem of the State of Israel).

The conference was covered by the international press, making a significant impression; the publicity subsequently inspired the antisemitic forgery The Protocols of the Elders of Zion.