| Carlo Demarchi | |
| Birth Date: | 25 March 1890 |
| Birth Place: | Turin, Italy |
| Position: | Midfielder |
| Years1: | 1909–1922 |
| Caps1: | 57 |
| Goals1: | 0 |
| Nationalyears1: | 1912 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
Carlo Demarchi (pronounced as /it/; 25 March 1890 - 5 October 1972) was an Italian footballer who played as a midfielder.[1] He competed for Italy in the men's football tournament at the 1912 Summer Olympics.[2]