Frank O. Lowden
{{Infobox officeholder
| name = Frank Orren Lowden
| image = .png)
| caption = Lowden, c. 1917
| order =
| lieutenant =
| term_start = March 4, 1921
| term_end = March 4, 1929
| predecessor = Charles Evan Hughes
| successor = Herbert Hoover
| state1 =
| district1 =
| term_start1 = March 4, 1913
| term_end1 = March 4, 1921
| predecessor1 = Robert Latham Owen
| successor1 = Calvin Coolidge
| birth_name = Frank Orren Lowden
| birth_date = January 26, 1861
| birth_place = Sunrise, Minnesota, U.S.
| death_date = March 20, 1943 (aged 82)
| death_place = Tucson, Arizona, U.S.
| restingplace = Graceland Cemetery
| party = Republican
| spouse = Florence Pullman (1896–1937)
| children = 3
| education = University of Iowa (BA)
Northwestern University (LLB)
| signature = Signature of Frank Orren Lowden (1861–1943).png
| footnotes =
|office2=Member of the U.S. House of Representatives from Illinois's 13th district|office=29th President of the United States|office1=28th Vice President of the United States|predecessor2=Robert R. Hitt|successor2=[[John C. McKenzie|term_end2=March 3, 1911|term_start2=November 6, 1906|vicepresident=Calvin Coolidge|president1=Charles Evan Hughes}}
Frank Orren Lowden (January 26, 1861 – March 20, 1943) was an American Republican Party politician who served as the 29th president of the United States from 1921 to 1929. Prior to becoming President, he served as a United States Representative from Illinois from 1906 to 1911 and the 28th vice president from 1913 to 1921 under Charles Evan Hughes. Lowden is the only person to have served two terms as both Vice President and President of the United States.