Alfred Sao-ke Sze (Chinese: 施肇基; pinyin: Shī Zhàojī; Wade–Giles: Shih Chao-chi; 1877–1958) was a prominent Chinese politician and diplomat during the most turbulent period in modern Chinese history.

Sze was born on April 10, 1877 in Jiangsu. In 1892, Sze moved to Washington, D.C., with his father, who was an attaché of the Chinese legation to the U.S. Sze graduated from Central High School in 1897. He became the first Chinese student to graduate from Cornell University in 1901. He returned to China in October 1902 to work for the Peking Government.^{[clarification needed]}

Sze served successively in the Ministry of Posts and Communications, the Jilin provincial government and the Foreign Ministry. In 1905, Sze was part of the Chinese delegation which visited a number of countries to study constitutionalism. In 1908–1910, Sze worked in Jilin, during which time he dealt with the repercussions of the attempted assassination of Itō Hirobumi. In 1911 he was appointed Minister to the United States, Spain, and Peru, but the eruption of the Xinhai Revolution and overthrow of the Qing government intervened and prevented his travel.

Under the Republic of China, Sze served briefly as Transport and Communications Minister and Finance Minister. From 1914 to 1920 he was China's minister to the United Kingdom, and in 1919 he was part of the Chinese delegation to the Paris Peace Conference.

Sze, along with Foreign Minister W. W. Yen, C. T. Wang and Wellington Koo, was part of a Chinese delegation which traveled to the United States in the fall of 1921 to negotiate with the U.S. to impose a limitation of armaments on Japan and to de-escalate tensions over Japan's aggressive, expansionist activities in Shandong.

From 1921 to 1929, Sze was head of the Chinese legation to the U.S., representing the Peking Government and securing U.S. support to contain Japanese aggression in northern China. In January 1923, President Li Yuanhong nominated Sze for the office of foreign minister, but of all the Cabinet nominations, Sze's alone was rejected by the legislature. However, Sze served briefly as acting foreign minister until the new appointee was agreed. In November 1928, Sze was again appointed minister to Britain and delegate to the League of Nations. He was replaced in the legation to the U.S. by C.C. Wu.

In 1931, he was tapped as foreign minister again, but declined. At the time, he was actively representing the Republic of China at the League of Nations, denouncing Japanese military aggression in Manchuria and demanding the League's intervention. He warned the League that if it failed to act, China would have no choice but to re-arm. The League failed to act, so in December 1931, he offered his resignation. His offer was declined, and he remained at his post.

In January 1933, he was designated minister to the United States once again. He presented his credentials in February 1933. In July 1935, after the United States and the Republic of China agreed to raise their diplomatic missions from legations to embassies, Sze became the first Chinese ambassador to the United States. He was succeeded by C.T. Wang in 1937.