Teodoro Rafael Yangco (born November 9, 1861) was a Filipino public official who served as a Representative in the United States Congress. Identified in congressional records under the bioguide ID Y000004, he represented the Philippine Islands (PI) as an at-large delegate. His party affiliation is listed as unknown in the available metadata.

Yangco served as a Representative for the Philippine Islands from April 2, 1917, to March 3, 1921, completing two terms in office. During this period, he held the role of a historical member of Congress, reflecting the political relationship between the United States and the Philippine Islands in the early twentieth century. He is recorded as a former officeholder, with no additional committee assignments, contact details, or official website provided in the available information.