| Clarence Walworth Alvord | |
| Birth Date: | 21 May 1868 |
| Birth Place: | Greenfield, Massachusetts, U.S. |
| Nationality: | American |
| Occupation: | History professor |
| Awards: | Loubat Prize (1918) |
Clarence Walworth Alvord (May 21, 1868 in Greenfield, Massachusetts[1] – January 27, 1928) was an American history professor, and winner of the 1918 Loubat Prize for his book The Mississippi Valley in British Politics.
Alvord spent most of his career at the University of Illinois, where between 1897 and 1920 he worked his way up the academic ranks from prep school teacher to full professor of history.
In 1926 he was the first non-British person to give the University of London's Creighton Lecture.